| Class/Group/Family | Topics |
|---|
| The "Rock of the Month" | with select "Museum Moments" (MM) |
|---|
| Acasta gneiss | --- #212 --- Oldest rock known on Earth, Northwest Territories, Canada |
| Adamellite | --- #29 --- Shap granite, Lake District, England |
| Agalmatolite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Agrellite - Na Ca F | --- #94 --- Agrellite and eudialyte, Kipawa, Quebec |
| Airfall deposits | --- #159 --- Lapilli tuff / cherty sediment of Sudbury impact event, central Ontario |
| Airfall deposits | --- #213 --- Impact ejecta, Thunder Bay, Ontario |
| Allivalite (troctolite) | --- #31 --- Allivalite, Rhum, Scotland |
| Almandine - Al Fe garnet | --- #230 --- Garnet in pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Altaite - Pb Te | --- #67 --- Rucklidgeite, rare telluride, N.E. Ontario |
| Amazonite feldspar | --- ---- --- See "tectosilicates - feldspars" |
| Amethyst - Si | --- ---- --- See "tectosilicates - silica" |
| Amethyst - Si | --- #206 --- Quartz as semi-precious stone, with amethyst |
| Ammonites | --- ---- --- See "fossils" section |
| Amphiboles | --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica |
| Amphiboles - lamprobolite (basaltic hornblende) | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Amphiboles - arfvedsonite | --- #138 --- Eudialyte syenite from Kipawa, Quebec (MM02) |
| Amphiboles - hornblende | --- #52 --- Titaniferous metagabbro, Norway |
| Amphiboles - hornblende | --- #65 --- Odegaardite, metagabbro from Norway |
| Amphiboles | --- #70 --- Nephrite jade from northern British Columbia |
| Amphiboles - hornblende in metagabbro | --- #149 --- Grenville metagabbro from Cordova (gold) Mines, Ontario |
| Amphiboles | --- #166 --- Unusual amphibole from the Grenville province, Ontario |
| Amphiboles | --- #215 --- Manganoan tremolite ("hexagonite") from Balmat, New York |
| Andalusite | --- #128 --- Chiastolite-muscovite schist pebble, Newfoundland |
| Andesite | --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica |
| Andesite | --- #62 --- Mineralized andesite, Guanajuato, Mexico |
| Andesite | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Andesite | --- #236 ---
Porphyritic andesites, La Malinche volcano, Mexico |
| Andesite | --- #237 ---
Glassy andesite ("pitchstone"), Popocatepetl volcano, Mexico |
| Andesite | --- ---- --- See "volcanics" |
| Andradite - Ca Fe garnet | --- #234 --- Garnet skarn, Rossland, British Columbia |
| Anorthosites | --- #50 --- Calcic anorthosite, northern Ontario |
| Anorthosites | --- #191 --- Keweenawan Mellen gabbro / gabbroic anorthosite, northern Wisconsin, U.S.A. |
| Anthraxolite | --- #64 --- Anthraxolite hydrocarbon, Sudbury, Ontario |
| Antimonides - Ni Sb | --- #184--- Breithauptite, nickel antimonide, from Cobalt, Ontario |
| Antimonides - Pt Sb | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Apatite | --- #1 ---- Apatite & orange calcite from Renfrew County, Grenville province, Ontario |
| Apatite | --- #2 ---- Apatite & biotite from the Bancroft area, Grenville province, Ontario |
| Apatite | --- #107 --- Apatite and phlogopite, Palabora, South Africa |
| Aplite | --- #202 --- Tourmaline and lepidolite in aplite from southern California, U.S.A. |
| Apophyllite | --- #134 --- Apophyllite from northern San Luis Potosi, Mexico (MM01) |
| Apophyllite | --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India |
| Appinite | --- #32 --- Appinite, Strontian area, Scotland |
| Archaeology - chert - stone tools | --- #24 --- Chert provenance (Pennsylvania, U.S.A.) |
| Archaeology - chert (flint) | --- #34 --- Flint walls, Essex, England |
| Archaeology - chert (flint) - stone tools | --- #79 --- Fractured flint from Essex, England |
| Archaeology - mapping in support of | --- #114 --- Peperite identified in outcrop in Tigrai, Ethiopia |
| Archaeology - native copper - Cu | --- #106 --- Native copper and datolite, northern Michigan, U.S.A |
| Archaeology - native copper - Cu | --- #143 --- Native "float copper" from Houghton county, Michigan, U.S.A. (MM05) |
| Archaeology - goldsmithing - Au | --- #223 --- Early Irish goldsmithing tools |
| Archaeology - jade | --- #207 --- Massive jade as decorative piece, from China |
| Archaeology - jadeitite - stone tools | --- #224 --- Irish stone tools made from Italian jadeitite |
| Archaeology - lunulae - Au | --- #223 --- Early Irish goldsmithing - jewellery |
| Archaeology - Qingtian stone | --- #203 --- Qingtian stone, superb lapidary material from China |
| Archaeology - tin - cassiterite - Sn | --- #209 --- Rich cassiterite tin ore, Cornwall, England |
| Arfvedsonite (amphibole) | --- #138 --- Eudialyte syenite from Kipawa, Quebec (MM02) |
| Arsenates - Co As | --- #133 --- Erythrite from Bou Azzer, Morocco |
| Arsenates - Pb As | --- #132 --- Mimetite, cerussite, sphaerocobaltite, Morocco |
| Arsenates - Pb As | --- #195 --- Smithsonite from Tsumeb, Namibia |
| Arsenides - Co Ni As | --- #40 --- Cobalt-nickel arsenide ore, Cobalt district, Ontario |
| Arsenides - Pt As | --- #81 --- Sperrylite, Sudbury, Ontario |
| Arsenides - Pt As | --- #81b -- Sperrylite, Sudbury, Ontario (.pdf, 138 kb) |
| Arsenopyrite - Fe As | --- #153 --- Gold skarn with arsenopyrite, Osoyoos, southern Okanagan, British Columbia |
| Arsenopyrite - Fe As | --- #8 ---- Berthierite, Iron-antimony sulphide from Borneo |
| Arsenopyrite - Fe As | --- #152 --- Quartz-wolframite vein with arsenopyrite, Cligga Head, Cornwall, England |
| Australites (tektites) | --- #55 --- Tektites from China |
| Australites (tektites) | --- #156 --- Historic "soccer ball" tektite from the Philippines |
| Azurite - Cu | --- #87 --- Azurite from Spain |
| Banded iron formation - BIF | --- #88 --- Banded iron formation, Western Australia |
| Banded iron formation - BIF | --- #98 --- Banded iron formation, south India |
| Barite - Ba S | --- #228 --- Barite on quartz, Jiangxi, China |
| Basalt | --- ---- --- See "volcanics" |
| Berthierite - Fe Sb | --- #8 ---- Berthierite, Iron-antimony sulphide from Borneo |
| Beryl - Be | --- #186--- Prismatic beryl from China |
| Bikolite (philippinite) tektite | --- #156 --- Historic "soccer ball" tektite from the Philippines, and others |
| Bivalves | --- ---- --- See "fossils" section |
| Borosilicates - B | --- #106 --- Native copper and datolite, northern Michigan, U.S.A |
| Borosilicates - B | --- #69 --- Dumortierite from Chile |
| Borosilicates - B | --- #120 --- Tourmalinite from Botallack, Cornwall, England |
| Borosilicates - B | --- #100 --- Pegmatitic granite, Tregonning-Godolphin stock, Cornwall, England |
| Borosilicates - B | --- #101 --- Tourmaline-rich granitic breccia, Wheal Remfry, Cornwall, England |
| Borosilicates - B | --- #202 --- Tourmaline and lepidolite from southern California, U.S.A. |
| Bournonite - Cu Pb Sb | --- #96 --- Bournonite from Pulacayo, Bolivia |
| Breccias - chert in iron formation | --- #89 --- Brecciated chert, Western Australia |
| Breccias - volcanic breccias | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Breccias - stony meteorite | --- #83 --- NWA 869 brecciated chondrite meteorite, Morocco |
| Breccias - stony meteorite | --- #216 --- Saricicek howardite (Vestan achondrite) meteorite |
| Breccias - stony-iron meteorite | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Breccias - impact | --- #213 --- Impact ejecta, breccias and ore, Thunder Bay and Sudbury, Ontario |
| Breccias - tourmaline breccia pipe | --- #101 --- Tourmaline-rich granitic breccia, Wheal Remfry, Cornwall, England |
| Breithauptite - Ni Sb | --- #184--- Breithauptite, nickel antimonide, from Cobalt, Ontario |
| Brucite - Mg | --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland |
| Bryozoans | --- ---- --- See "fossils" section |
| Bytownite feldspar | --- #50 --- Calcic anorthosite, northern Ontario |
| Cabriite - Cu Sn Pd | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Calaverite - Au Ag Te | --- #158 --- Gold-silver tellurides, Colorado, U.S.A., I |
| Calaverite - Au Ag Te | --- #161 --- Gold-silver tellurides, Colorado, U.S.A., II |
| Calcite | --- ---- --- See "carbonates" |
| Camerina | --- #226 --- Camerina, Eocene fossil nummulite foraminiferan, Java, Indonesia |
| Carbonado - C | --- #26 --- Diamond and carbonado, Siberia & Africa |
| Carbonates - Ca | --- #85 --- Calcite from Zacatecas, Mexico |
| Carbonates - Ca | --- #122 --- Calcite, Grenville province, Ontario |
| Carbonates - Ca | --- #1 ---- Apatite & orange calcite from Renfrew County, Grenville province, Ontario |
| Carbonates - Ca (pink calcite) | --- #126 --- Native silver in vein, Silver Islet, Thunder Bay area, Ontario |
| Carbonates - Ca | --- #198 --- Calcite in fluorescent zinc ore, New Jersey, U.S.A. |
| Carbonates - Ca (with amphibole) | --- #166 --- Unusual amphibole in calcite, Grenville province, Ontario |
| Carbonates - Co | --- #132 --- Mimetite, cerussite,sphaerocobaltite, Morocco |
| Carbonates - Cu | --- #87 --- Azurite from Spain |
| Carbonates - Zn | --- #195 --- Smithsonite from Tsumeb, Namibia |
| Carbonates - Pb | --- #132 --- Mimetite, cerussite, sphaerocobaltite, Morocco |
| Carbonates - Mn | --- #157 --- Manganese ores, Kalahari manganese field, South Africa |
| Carbonates - Ni | --- #232 --- Gaspeite, Ni carbonate, in calcite, from southeast Quebec |
| Carbonatite | --- #107 --- Apatite and phlogopite, Palabora, South Africa |
| Cassiterite - Sn | --- #209 --- Rich cassiterite tin ore, Cornwall, England |
| Cephalopods | --- ---- --- See "fossils" section |
| Cerussite - Pb | --- #132 --- Mimetite, cerussite,sphaerocobaltite, Morocco |
| Chabazite | --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India |
| Chalcopyrite - Cu | --- #115 --- Chalcopyrite ore, McCreedy West mine, Sudbury, Ontario |
| Chalcopyrite - Cu | --- #213 --- Impact ejecta, and chalcopyrite ore, McCreedy West mine, Sudbury, Ontario |
| Chalcopyrite - Cu | --- #190 --- Sudbury copper-PGE ore, Broken Hammer deposit |
| Chalcopyrite - Cu | --- #171 --- Germanite in Cu Ge (Zn) ore, Tsumeb, Namibia |
| Chalcopyrite - Cu | --- #148 --- Silica-flooded sulphidic ore, Mineral de Pozos, Guanajuato, Mexico |
| Charnockite | --- #68 --- Sulphidic charnockite, Kodaikanal, south India |
| Charnockite | --- #9 ---- Charnockite, a deep and meaningful granitoid rock, Baffin Island, Nunavut |
| Chemical sediments | --- ---- --- See, e.g., "chert", "banded iron formation" |
| Chert - Si | --- ---- --- See also "tectosilicates - silica" for other forms |
| Chert - Si | --- #16 --- Chert & chalcedony (Pennsylvania, U.S.A.) |
| Chert - Si | --- #23 --- Chert & microfossils (Pennsylvania, U.S.A.) |
| Chert - Si | --- #24 --- Chert provenance (Pennsylvania, U.S.A.) |
| Chert - Si | --- #76 --- Chert from the Crowe valley, S.E. Ontario |
| Chert - Si | --- #232 --- Chert and fossils in Ordovician limestone, Crowe valley, S.E. Ontario |
| Chert (flint) - Si | --- #34 --- Flint walls, Essex, England |
| Chert (flint) - Si | --- #79 --- Fractured flint from Essex, England |
| Chert in iron formation - Si | --- #89 --- Brecciated chert, Western Australia |
| Chiastolite (andalusite) | --- #128 --- Chiastolite-muscovite schist pebble, Newfoundland |
| Chondrules in meteorites | --- #49 --- Moorabie L3.8 chondrite, a meteorite from N.S.W., Australia |
| Chromates - Pb Cr | --- #109 --- Crocoite from Tasmania, Australia |
| Chrome diopside | --- #125 --- Chrome diopside, Russia |
| Chrome diopside | --- #197 --- Chrome diopside in lodranite meteorite NWA 11129, Morocco |
| Chromite (Cr spinel) | --- #60 --- UG-2 chromitite, Bushveld complex, South Africa |
| Chromite - Cr | --- #220 --- South African chromites (Bushveld UG-2 chromitite, II) |
| Chromite - Cr | --- #205 --- Chromitite, Luobusa ophiolite, southern Tibet |
| Chromite in meteorites | --- #154 --- Chromite as accessory in L4 chondrite (NWA 12807) |
| Chrysanthemum stone | --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China |
| Chrysocolla - Cu | --- #45 --- Chrysocolla from Wyoming, U.S.A. |
| Cinnabar - Hg | --- #4 ---- Cinnabar, mercury ore from Almaden, Spain |
| Citrine - Si | --- #206 --- Quartz as semi-precious stone: nine faceted examples |
| Clay minerals | --- #203 --- Qingtian stone, superb lapidary material from China |
| Concretions - weathered out | --- #74 --- Siltstone cobble, Slate Islands, N.W. Ontario |
| Concretions - unusual sandstone | --- #84 --- Concretion, northwest Ontario |
| Concretions - pyrite in shale | --- #172 --- Pyrite sun (concretion), Illinois, U.S.A. > |
| Conglomerate | --- #72 --- Palaeobeach with igneous pebbles, Cuba |
| Copper - Cu | --- #143 --- Native "float copper" from Houghton county, Michigan, U.S.A. (MM05) |
| Copper - Cu | --- #106 --- Native copper and datolite, northern Michigan, U.S.A |
| Coquina - limestone | --- #208 --- Shelly Ordovician limestone, Campbellford, southeast Ontario |
| Cordierite | --- #43 --- Khondalite from Kerala, south India |
| Corundum | --- ---- --- See "oxides - Al" |
| Covellite - Cu | --- #171 --- Trace secondary mineral in Cu Ge ore, Tsumeb, Namibia |
| Crinoids | --- ---- --- See "fossils" section |
| Crocoite - Pb Cr | --- #109 --- Crocoite from Tasmania, Australia |
| Crystal habit - example of galena | --- #214 --- Galena crystal habits, Huanzala, Peru & Madan, Bulgaria |
| Crystal habit - skeletal habit | --- #176 --- Slag from the Durango mining district, Colorado, U.S.A. |
| Cumulates | --- #31 --- Allivalite, Rhum, Scotland |
| Cyclosilicates - B | --- #120 --- Tourmalinite from Botallack, Cornwall, England |
| Cyclosilicates - B | --- #100 --- Pegmatitic granite from Cornwall, England |
| Cyclosilicates - B | --- #101 --- Tourmaline-rich granitic breccia from Cornwall, England |
| Cyclosilicates - cordierite | --- #43 --- Khondalite from Kerala, south India |
| Cyclosilicates - B | --- #69 --- Dumortierite from Chile |
| Cyclosilicates - Zr | --- #138 --- Eudialyte syenite from Kipawa, Quebec (MM02) |
| Cyclosilicates - Be | --- #186--- Prismatic beryl from China |
| Cylindrite - Pb Sn Sb | --- #33 --- Cylindrite from Bolivia |
| Datolite - B | --- #106 --- Native copper and datolite, northern Michigan, U.S.A |
| Diabase | --- #17-18 Double take: igneous rocks from Earth & space |
| Diabase | --- #126 --- Native silver in vein, Silver Islet, Thunder Bay area, Ontario |
| Diamond - C | --- #25 --- Diamonds from Africa |
| Diamond - C | --- #26 --- Diamond and carbonado, Siberia & Africa |
| Diamond, chromitite host - C | --- #205 --- Chromitite, Luobusa ophiolite, Tibet (no illustration) |
| Dickite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Dimension stone | --- #169 --- Leucogranite textures and mineralogy |
| Dimension stone | --- #179 --- Textures in a rapakivi granite from Beijing, China |
| Dimension stone | --- #211 --- Tyndall stone, trace fossils, Ordovician limestone, Manitoba |
| Diopside | --- ---- --- See "chrome diopside" or "inosilicates" |
| Diorites | --- #32 --- Appinite, Strontian area, Scotland |
| Diorites | --- #39 --- A Young plutonic rock from Borneo |
| Diorites | --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China |
| Dolostone - tempestite | --- #219 --- Tempestite - Jixian dolostone, Tianjin, China |
| Dumortierite - B | --- #69 --- Dumortierite from Chile |
| Dunite | --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia |
| Echinoderms | --- ---- --- See "fossils" section |
| Echinoids | --- ---- --- See "fossils" section |
| Elbaite - B | --- #202 --- Tourmaline and lepidolite from southern California, U.S.A. |
| Epidote | --- #50 --- Calcic anorthosite, northern Ontario |
| Erythrite - Co As | --- #133 --- Erythrite from Bou Azzer, Morocco |
| Eudialyte - Zr | --- #138 --- Eudialyte syenite from Kipawa, Quebec (MM02) |
| Eudialyte - Zr | --- #94 --- Agrellite and eudialyte, Kipawa, Quebec |
| Exhalites | --- ---- --- See "chemical sediments", e.g., "banded iron formation" |
| Feldspars | --- ---- --- See "tectosilicates - feldspars", "anorthosites", etc |
| Ferrosilicon - Fe Si | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Flint - Si | --- ---- --- See "chert" |
| Fluorite - Ca F | --- #140 --- Blue John fluorite, Derbyshire, England (MM03) |
| Fluorescence - scapolite | --- #90 --- Scapolite from Quebec |
| Fluororichterite | --- #166 --- Unusual amphibole from the Grenville province, Ontario |
| Foraminifera ("forams") | --- ---- --- See "fossils" section |
| Fossils - arthropoda - trilobites | --- #185 --- The trilobite Phacops from the Devonian of Morocco |
| Fossils - bryozoans | --- #11 --- Fossil bryozoan from southern Ontario |
| Fossils - bryozoans | --- #232 --- Branching bryozoans in Ordovician limestone, Crowe valley, S.E. Ontario |
| Fossils - echinoderms - crinoids | --- #181 --- Traumatocrinus from the Triassic of Guizhou, China |
| Fossils - echinoderms - crinoids | --- #208 --- Shelly Ordovician limestone, Campbellford, southeast Ontario |
| Fossils - echinoderms - echinoids | --- #218 --- Echinoids from the Eocene Ocala limestone, Florida, U.S.A. |
| Fossils - echinoderms - ophiuroids | --- #168 --- Echinodermata and the lithographic stone of Solnhofen, Germany |
| Fossils - foraminifera | --- #226 --- Camerina, Eocene fossil nummulite foraminiferan, Java, Indonesia |
| Fossils - hydrozoa - corals | --- #232 --- Coral in Ordovician limestone, Crowe valley, S.E. Ontario |
| Fossils - hydrozoa - graptolites | --- #111 --- Graptolite fossils from Dyfed, Wales |
| Fossils - hydrozoa - stromatoporoids | --- #232 --- Stromatoporoids in Ordovician limestone, Crowe valley, S.E. Ontario |
| Fossils - mollusca - bivalves | --- #141 --- Bivalve fossils from Iceland |
| Fossils - mollusca - bivalves | --- #183 --- The bivalve Glycimeris in the Pliocene Red Crag of Essex, England |
| Fossils - mollusca - cephalopods | --- #139 --- Fossil "surprise" cephalopods from Nepal |
| Fossils - mollusca - cephalopods | --- #163 --- Mesozoic ammonite fossil, Madagascar |
| Fossils - mollusca - cephalopods | --- #232 --- Orthocones in Ordovician limestone, Crowe valley, S.E. Ontario |
| Fossils - mollusca - gastropods | --- #189 --- Gastropods old and new |
| Fossils - thanatocoenosis | --- #208 --- Shelly Ordovician limestone, Campbellford, southeast Ontario |
| Fossils - trace fossils | --- #187 --- Thalassinoides, burrow, trace fossil from lower Chalk of Norfolk, England |
| Fossils - trace fossils | --- #211 --- Tyndall stone, trace fossils, Ordovician limestone, Manitoba |
| Fossils - vertebrate | --- #229 --- Keichousaurus, Triassic fossil reptile, China |
| Fossils - vertebrate | --- #201 --- Mesosaurus, fossil reptile and mascot for Gondwanaland |
| Franklinite - Zn Fe Mn | --- #198 --- Franklinite in fluorescent zinc ore, New Jersey, U.S.A. |
| Fuchsite - Cr green mica | --- #35 --- Green mica in gold ore, Western Australia |
| Fulgurites | --- #37 --- Fulgurite from Ontario |
| Fulgurites | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Fulgurites | --- #123 --- Fulgurite, Grant county, Nebraska, U.S.A. |
| Fulgurites | --- #124 --- Fulgurite, Florence, Arizona, U.S.A. |
| Fulgurites | --- #124 --- Fulgurite, Oswego, New York, U.S.A. |
| Gabbro | --- --- --- see also "metagabbro", "troctolite" |
| Gabbro | --- #191 --- Keweenawan Mellen gabbro / gabbroic anorthosite, northern Wisconsin, U.S.A. |
| Galena - Pb | --- #48 --- Zinc-lead vein from the Grenville province of S.E. Ontario |
| Galena - Pb | --- #148 --- Silica-flooded sulphidic ore, Mineral de Pozos, Guanajuato, Mexico |
| Galena - Pb (with tellurides) | --- #67 --- Rucklidgeite, rare telluride, N.E. Ontario |
| Galena - Pb (with PGM) | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Galena - Pb (Ag) | --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A. |
| Galena - Pb | --- #196 --- Unusual galena habit from Madan, Bulgaria |
| Galena - Pb | --- #200 --- Galena crystal habits, Viburnum Trend, Missouri and Keno Hill, Yukon |
| Galena - Pb | --- #214 --- Galena crystal habits, Huanzala, Peru & Madan, Bulgaria |
| Gallite - Ga | --- #171 --- Germanite in Cu Ge ore, Tsumeb, Namibia |
| Garnet - metasediments | --- #43 --- Khondalite from Kerala, south India |
| Garnet - leucogranite | --- #169 --- Leucogranite textures and mineralogy |
| Garnet - leucogranite - Mn Al Fe | --- #230 --- Garnet in pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Garnet - skarn | --- #234 --- Garnet skarn, Rossland, British Columbia |
| Garnet - kimberlite | --- #222 --- Diamond indicator minerals, kimberlite |
| Gaspeite - Ni | --- #232 --- Gaspeite, Ni carbonate from southeast Quebec |
| Gastropods | --- ---- --- See "fossils" section |
| Gemstones | --- ---- --- See also individual species of "semi-precious stones" |
| Gemstones - beryl (emerald) | --- #186--- Prismatic beryl from China |
| Gemstones - corundum (ruby, sapphire) | --- #14 --- Corundum (ruby & sapphire) from India |
| Geological time scale | --- #212 --- Geochronology, oldest rocks, Earth history |
| Germanium minerals - Ge | --- #171 --- Germanite in Cu Ge ore, Tsumeb, Namibia |
| Geversite - Pt Sb | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Glass (various) | --- ---- --- See also "tektites", "volcanics", "slags", chondrules in meteorites, etc |
| Glass in slag | --- #176 --- Slag from the Durango mining district, Colorado, U.S.A. |
| Glass in andesite | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Glass in andesite | --- #236 ---
Porphyritic andesites, La Malinche volcano, Mexico |
| Glass in andesite (pitchstone) | --- #237 ---
Glassy andesite ("pitchstone"), Popocatepetl volcano, Mexico |
| Glauconite (discussion only) | --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A. |
| Glomerocryst | --- #160 --- Porphyry (volcanic tuff), ornamental stone, Dyfed, Wales |
| Glomerocryst | --- #178 --- Glomeroporphyritic metabasite (amphibolite) from China |
| Glomerocryst | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Glomeroporhyritic texture | --- #178 --- Glomeroporphyritic metabasite (amphibolite) from China |
| Gneiss | --- #212 --- Acasta gneiss, Northwest Territories, Canada |
| Gold - Au | --- ---- --- See "native elements - Au", "tellurides", & "ores - Au" |
| Granitoids | --- #9 ---- Charnockite, a deep and meaningful granitoid rock, Baffin Island, Nunavut |
| Granitoids | --- #29 --- Shap granite, Lake District, England |
| Granitoids | --- #30 --- Ross of Mull granite, Scotland |
| Granitoids | --- #47 --- Granitic pegmatite from the Grenville province of S.E. Ontario |
| Granitoids | --- #54 --- Granite boulders of southeastern Wyoming, U.S.A. |
| Granitoids | --- #169 --- Leucogranite textures and mineralogy |
| Granitoids | --- #68 --- Sulphidic charnockite, Kodaikanal, south India |
| Granitoids | --- #92 --- Orbicular granite, coast of northern Chile |
| Granitoids | --- #100 --- Pegmatitic granite from Cornwall, England |
| Granitoids | --- #101 --- Tourmaline-rich granitic breccia from Cornwall, England |
| Granitoids | --- #102 --- Perthitic granite pegmatite, Grenville province, Ontario |
| Granitoids | --- #179 --- Textures in a rapakivi granite from Beijing, China |
| Granitoids | --- #230 --- Mica-rich pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Graphite - C | --- #46 --- Graphite from the Bushveld of South Africa |
| Graptolites | --- ---- --- See "fossils" section |
| Green micas - Cr (fuchsite) | --- #35 --- Green mica in gold ore, Western Australia |
| Green micas - V (roscoelite) | --- #95 --- Green micaceous gold ore, Hemlo, Ontario |
| Greisen | --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England |
| Grossular - Ca Al garnet | --- #234 --- Garnet skarn, Rossland, British Columbia |
| Gupeiite - Fe Si (no specific illustration) | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Gypsum - Ca S | --- #165 --- Sand-infused gypsum "rose", Aransas Pass, Texas, U.S.A. |
| Halides - Ca F | --- #140 --- Blue John fluorite, Derbyshire, England (MM03) |
| Halides - Na Cl | --- #110 --- Sea salt (in essence, "synthetic halite") from Essex, England |
| Halleflinta | --- #53 --- Halleflinta from southwest Wales |
| Hapkeite - Fe Si (no specific illustration) | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Harzburgite | --- #205 --- Chromitite, Luobusa ophiolite, southern Tibet |
| Harzburgite | --- #217 --- Peridotite mantle xenoliths in basalt, North China craton, Hebei, China |
| Hausmannite - Mn | --- #157 --- Manganese ores, Kalahari manganese field, South Africa |
| Hematite | --- #164 --- Botryoidal hematite, iron oxide from Bou Azzer, Morocco |
| Hemimorphite - Zn | --- #195 --- Hemimorphite from Ojuela mine, Mapimi, Durango, Mexico |
| Hexagonite (variety of amphibole) | --- #215 --- Manganoan tremolite ("hexagonite") from Balmat, New York |
| Hydrocarbons | --- #64 --- Anthraxolite hydrocarbon, Sudbury, Ontario |
| Hydrothermal alteration | --- #35 --- Green mica in gold ore, Western Australia |
| Hydrothermal alteration | --- #45 --- Chrysocolla from Wyoming, U.S.A. |
| Hydrothermal alteration | --- #63 --- Jasperoid, Jerritt Canyon, Nevada, U.S.A. |
| Hydroxides - Mg | --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland |
| Ice | --- #38 --- Ice - a mineral! |
| Illite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Ilmenite - Fe Ti Mg | --- #222 --- Diamond indicator minerals, kimberlite |
| Impact events | --- #75 --- Shatter cone, Slate Islands, N.W. Ontario |
| Impact events | --- #159 --- Lapilli tuff / cherty sediment of Sudbury impact event, central Ontario |
| Impact events | --- #213 --- Impact ejecta, breccias and ore, Thunder Bay and Sudbury, Ontario |
| Impact events - tektites | --- ---- --- See "tektites" |
| Impact events - meteorites | --- #146 --- Chelyabinsk LL5 brecciated ordinary chondrite meteorite, Russia |
| Impact events - meteorites | --- #154 --- Classification of an NWA (Northwest Africa) "black chondrite" meteorite (NWA 12807) |
| Indicator minerals | --- #222 --- Diamond indicator minerals, kimberlite |
| Inosilicates - agrellite | --- #94 --- Agrellite and eudialyte, Kipawa, Quebec |
| Inosilicates - amphiboles | --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica |
| Inosilicates - amphiboles | --- #235 --- - Basaltic hornblende in andesite, Pico de Orizaba, Mexico |
| Inosilicates - amphiboles - arfvedsonite | --- #138 --- Eudialyte syenite from Kipawa, Quebec (MM02) |
| Inosilicates - amphiboles | --- #70 --- Nephrite jade from northern British Columbia |
| Inosilicates - amphiboles | --- #166 --- Unusual amphibole from the Grenville province, Ontario |
| Inosilicates - amphiboles | --- #215 --- Manganoan tremolite ("hexagonite") from Balmat, New York |
| Inosilicates - pyroxenes | --- #125 --- Chrome diopside, Russia |
| Inosilicates - pyroxenes | --- #197 --- Chrome diopside in lodranite meteorite NWA 11129, Morocco |
| Inosilicates - pyroxenes | --- #217 --- Clinopyroxene megacrysts in xenolithic basalt, North China craton, Hebei, China |
| Inosilicates - pyroxenes | --- #224 --- Irish stone tools made from Italian jadeitite |
| Inosilicates - pyroxenoids | --- #22 --- Pyroxmangite (`rhodonite') from Colorado, U.S.A. |
| Intermetallics - Cu Sn Pd | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Iron - Fe | --- #121 --- Putorana metal-rich basalt / pseudometeorite, Siberia |
| Iron - Fe | --- #221 --- Native iron from Russia, II |
| Iron formation - BIF | --- #88 --- Banded iron formation, Western Australia |
| Iron formation - BIF | --- #98 --- Banded iron formation, south India |
| iss (Cu-rich sulphide "matte") | --- ---- --- See "sulphides" |
| Jade | --- #70 --- Jade from northern British Columbia |
| Jade | --- #207 --- Massive jade as decorative piece, from China |
| Jadeitite | --- #224 --- Irish stone tools made from Italian jadeitite |
| Jasper (red flinty/cherty silica) | --- #88 --- Banded iron formation, Western Australia |
| Jasperoid (hydrothermal silicification) | --- #63 --- Jasperoid, Jerritt Canyon, Nevada, U.S.A. |
| Kamacite - Ni Fe | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Kamacite (a variant of native iron) | --- ---- --- See the majority of "meteorite" records, especially irons and stony-irons |
| Kaolinite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Khondalite | --- #43 --- Khondalite from Kerala, south India |
| Kimberlite indicator minerals | --- #222 --- Diamond indicator minerals, kimberlite |
| Krageroite - metagabbro | --- #52 --- Titaniferous metagabbro, Norway |
| Kutnohorite - Mn | --- #157 --- Manganese ores, Kalahari manganese field, South Africa |
| Lamellibranchs | --- ---- --- See "fossils - bivalves" |
| Lamprobolite (basaltic hornblende) | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Lamprophyres | --- #56 --- Lamprophyre (intermediate porphyry) from Rossland, British Columbia |
| Lapilli tuff | --- #159 --- Lapilli tuff / cherty sediment of Sudbury impact event, central Ontario |
| Lapilli tuff | --- #213 --- Impact ejecta, Thunder Bay, Ontario |
| Larderite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Lepidolite | --- ---- --- See "phyllosilicates" |
| Leucogranite | --- #169 --- Leucogranite textures and mineralogy |
| Leucogranite | --- #230 --- Mica-rich pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Lightning | --- ---- --- See "fulgurites" |
| Limestones | --- ---- --- See also "sediments" |
| Limestones | --- #211 --- Tyndall stone, trace fossils, Ordovician limestone, Manitoba |
| Listwanite | --- #35 --- Green mica in gold ore, Western Australia |
| Lithographic stone | --- #168 --- Echinodermata and the lithographic stone of Solnhofen, Germany |
| Luobusaite - Fe Si | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Luobusaite - Fe Si | --- #205 --- Chromitite, Luobusa ophiolite, southern Tibet (no illustration) |
| Magma chamber processes | --- #31 --- Allivalite, Rhum, Scotland |
| Magnetite | --- #71 --- Oxide-rich pegmatite, Grenville province, S.E. Ontario |
| Magnetite | --- #230 --- Magnetite in
pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Manganese oxides - Mn | --- #157 --- Manganese ores, Kalahari manganese field, South Africa |
| Manganese oxides - Mn | --- #182 --- Manganese oxide (pyrolusite) dendrites, Atacama desert, Chile |
| Marble | --- ---- --- See "metasediments" |
| Marl | --- #36 --- Pyrite from Navajun, Spain |
| Megacrysts (clinopyroxene) | --- #217 --- Peridotite mantle xenoliths in basalt, North China craton, Hebei, China |
| Metacinnabar - Hg | --- #4 ---- Cinnabar, mercury ore from Almaden, Spain |
| Metadiorite | --- #178 --- Glomeroporphyritic metadiorite (amphibolite) from China |
| Metagabbros | --- #149 --- Grenville metagabbro from Cordova (gold) Mines, Ontario |
| Metagabbros | --- #150 --- Coronitic Grenville metagabbro, Muskoka district, Ontario |
| Metagabbros | --- #13 --- Gabbro boulder, southern Ontario |
| Metagabbros | --- #28 --- Gabbro boulder, Marmora, Ontario |
| Metagabbros | --- #52 --- Titaniferous metagabbro, Norway |
| Metagabbros | --- #65 --- Odegaardite, metagabbro from Norway |
| Metagabbros | --- #71 --- Oxide-rich pegmatite, Grenville province, S.E. Ontario |
| Metasediments - silicate | --- #43 --- Khondalite from Kerala, south India |
| Metasediments - marble | --- #51 --- Forsterite marble, Scotland |
| Metasediments - marble | --- #58 --- Marbles of the Grenville province, S.E. Ontario |
| Metasediments - marble | --- #204 --- Marble, York River zone, Bancroft, Ontario, Canada |
| Metasediments - marble | --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland |
| Metasediments | --- #128 --- Chiastolite-muscovite schist pebble, Newfoundland |
| Metavolcanics | --- #53 --- Halleflinta from southwest Wales |
| Meteorites - achondrites - ACAP | --- #238 --- Lodranite NWA 10155 (acapulcoites are discussed, but not shown) |
| Meteorites - achondrites - brachinites | --- #188 --- NWA 10637, NWA 6292 and NWA 5363 brachinite(-like) achondrite meteorites |
| Meteorites - achondrites - HED | --- #17-18 Double take: igneous rocks from Earth & space (Millbillillie eucrite) |
| Meteorites - achondrites - HED | --- #104 --- Dhofar 485 howardite meteorite, Oman |
| Meteorites - achondrites - HED | --- #216 --- Saricicek howardite (Vestan achondrite) meteorite breccia |
| Meteorites - achondrites - LOD | --- #197 --- Lodranite NWA 11129, an achondrite meteorite, Morocco |
| Meteorites - achondrites - LOD | --- #238 --- Lodranite meteorite NWA 10155, metal-rich achondrite, Morocco |
| Meteorites - achondrites - WIN | --- #41 --- NWA 1463 Winonaite (rare achondrite meteorite), Northwest Africa) |
| Meteorites - chondrites - CBa | --- #117 --- Bencubbin CBa bencubbinite meteorite, Western Australia |
| Meteorites - chondrites - CBa | --- #118 --- Gujba CBa bencubbinite meteorite, Nigeria |
| Meteorites - chondrites - CM2 | --- #212 --- Oldest rock known on Earth / note on oldest dates from meteorites like Murchison |
| Meteorites - chondrites - CO3 | --- #170 --- NWA 6136 CO3 carbonaceous chondrite, Morocco |
| Meteorites - chondrites - CV3 | --- #136 --- Allende CV3 carbonaceous chondrite meteorite, Mexico |
| Meteorites - chondrites - CV3 | --- #212 --- Oldest rock known on Earth / note on oldest dates from meteorites like Allende |
| Meteorites - chondrites - H4 | --- #119 --- NWA 5425 H4 chondrite meteorite, Morocco |
| Meteorites - chondrites - H5 | --- #135 --- Covert H5 ordinary chondrite meteorite, Kansas, U.S.A. |
| Meteorites - chondrites - H5 | --- #227 --- Gao-Guenie H5 meteorite shower, Burkina Faso |
| Meteorites - chondrites - L3 | --- #49 --- Moorabie L3.8 chondrite, a meteorite from N.S.W., Australia |
| Meteorites - chondrites - L3-6 | --- #83 --- NWA 869 brecciated chondrite meteorite, Morocco |
| Meteorites - chondrites - L4 | --- #154 --- Classification of an NWA (Northwest Africa) "black chondrite" meteorite (NWA 12807) |
| Meteorites - chondrites - L6 | --- #7 ---- Holbrook meteorite (Arizona, U.S.A.) |
| Meteorites - chondrites - L6 | --- #3 ---- Meteorite recognition - Kitchener |
| Meteorites - chondrites - LL3 | --- #162 --- NWA 5731, LL3.2 chondrite meteorite, Morocco |
| Meteorites - chondrites - LL5 | --- #146 --- Chelyabinsk LL5 brecciated ordinary chondrite meteorite, Russia |
| Meteorites - general | --- #3 ---- Meteorite recognition |
| Meteorites - irons - IAB | --- #3 ---- Meteorite recognition - Toronto |
| Meteorites - irons - IAB | --- #173 --- Maslyanino iron meteorite with silicate inclusions, Russia |
| Meteorites - irons - IAB-MG | --- #93 --- Campo del Cielo iron meteorite, Argentina |
| Meteorites - irons - IAB-sLL | --- #129 --- Toluca iron meteorite, Mexico |
| Meteorites - irons - IC | --- #194 --- Mount Dooling IC iron meteorite, W.Australia |
| Meteorites - irons - IIAB | --- #193 --- Agoudal IIAB iron meteorite, Morocco |
| Meteorites - irons - IVA | --- #86 --- Gibeon iron meteorite, Namibia |
| Meteorites - irons - UNGR | --- #151 --- Gebel Kamil nickel-rich iron meteorite, Egypt |
| Meteorites - irons - UNGR | --- #233 --- Dronino sulphide-rich iron meteorite, Russia |
| Meteorites - largest (heaviest) | --- #93 --- Campo del Cielo iron meteorite, Argentina |
| Meteorites - micrometeorites | --- #227 --- Gao-Guenie H5 meteorite shower, Burkina Faso |
| Meteorites - stony-irons - MES | --- #145 --- NWA 1242 mesosiderite, a stony-iron meteorite, Libya |
| Meteorites - stony-irons - PAL | --- #116 --- Springwater pallasite meteorite, Saskatchewan |
| Meteorites - stony-irons - PAL | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Meteorites - stony-irons - PAL | --- #127 --- Photo, slice of Brenham pallasite, Kansas, U.S.A. |
| Meteorites - stony-irons - PAL | --- #127 --- Photo, slice of Brahin pallasite, Belarus |
| Micas | --- ---- --- See "phyllosilicates" |
| Microcline (var. amazonite) | --- ---- --- See "tectosilicates - feldspars" |
| Millerite - Ni | --- #5 ---- Violarite, nickel ore from Sudbury, Ontario |
| Mimetite - Pb As | --- #132 --- Mimetite, cerussite, sphaerocobaltite, Morocco |
| Minium - Pb | --- #113 --- Minium from Colorado and Arizona, U.S.A. |
| Monzogranite | --- #29 --- Shap granite, Lake District, England |
| Mudan stone | --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China |
| Muscovite mica | --- #230 --- Mica-rich pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Nacrite (kaolinite polymorph) | --- #203 --- Qingtian stone, superb lapidary material from China |
| Naquite - Fe Si | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Native elements - Ag | --- #126 --- Native silver in vein, Silver Islet, Thunder Bay area, Ontario |
| Native elements - Ag (with PGM) | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Native elements - Au | --- #21 --- Native gold from California, U.S.A. |
| Native elements - Au | --- #77 --- Native gold from Guyana |
| Native elements - Au | --- #78 --- Native gold from Timmins, Ontario |
| Native elements - Au | --- #158 --- Gold-silver tellurides, Colorado, U.S.A., I |
| Native elements - Au | --- #8 ---- Berthierite, Iron-antimony sulphide from Borneo |
| Native elements - Au - goldsmithing | --- #223 --- Early Irish goldsmithing tools |
| Native elements - C | --- #25 --- Diamonds from Africa |
| Native elements - C | --- #26 --- Diamond and carbonado, Siberia & Africa |
| Native elements - C | --- #46 --- Graphite from the Bushveld of South Africa |
| Native elements - Cu | --- #106 --- Native copper and datolite, northern Michigan, U.S.A |
| Native elements - Cu | --- #143 --- Native "float copper" from Houghton county, Michigan, U.S.A. (MM05) |
| Native elements - Fe | --- #121 --- Putorana metal-rich basalt / pseudometeorite, Siberia |
| Native elements - Fe | --- #221 --- Native iron from Russia, II (Khungtukun) |
| Native elements - Os | --- #177 --- Native osmium from the Urals of Russia |
| Nephrite jade | --- #70 --- Jade from northern British Columbia |
| Nephrite jade | --- #207 --- Massive jade as decorative piece, from China |
| Nesosilicates - garnet in khondalite | --- #43 --- Khondalite from Kerala, south India |
| Nesosilicates - garnet in leucogranite | --- #169 --- Leucogranite textures and mineralogy |
| Nesosilicates - garnet in leucogranite | --- #230 --- Garnet in pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Nesosilicates - garnet skarn | --- #234 --- Garnet skarn, Rossland, British Columbia |
| Nesosilicates - garnet in kimberlite | --- #222 --- Diamond indicator minerals, kimberlite |
| Nesosilicates - hemimorphite | --- #195 --- Smithsonite from Tsumeb, Namibia |
| Nesosilicates - olivine | --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia |
| Nesosilicates - olivine | --- #217 --- Peridotite mantle xenoliths in basalt, North China craton, Hebei, China |
| Nesosilicates - olivine | --- #31 --- Allivalite, Rhum, Scotland |
| Nesosilicates - olivine | --- #49 --- Moorabie L3.8 chondrite, a meteorite from N.S.W., Australia |
| Nesosilicates - olivine | --- #127 --- Seymchan (Brahin, Brenham) pallasites, stony-iron meteorites |
| Nesosilicates - olivine | --- #116 --- Springwater pallasite meteorite, Saskatchewan |
| Nesosilicates - olivine | --- #188 --- NWA 10637, NWA 6292 and NWA 5363 brachinite(-like) achondrite meteorites |
| Nesosilicates - sillimanite | --- #43 --- Khondalite from Kerala, south India |
| Nesosilicates - titanite | --- #167 --- Titanite (sphene) from the Grenville province, Ontario |
| Neumann lines | --- #193 --- Agoudal IIAB iron meteorite, Morocco |
| Niccolite - Ni As | --- #40 --- Cobalt-nickel arsenide ore, Cobalt district, Ontario |
| Nickel - Ni | --- ---- --- See "niccolite" and iron meteorite phases like kamacite and schreibersite |
| Nickel antimonide | --- #184--- Breithauptite, nickel antimonide, from Cobalt, Ontario |
| Nickel arsenides | --- #40 --- Cobalt-nickel arsenide ore, Cobalt district, Ontario |
| Nickel sulphides | --- #97 --- Massive sulphide bear as folk-art carving (Sudbury, Ontario) |
| Nickel sulphides | --- #5 ---- Violarite, nickel ore from Sudbury, Ontario |
| Nickel-iron alloys: taenite | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Nitrides - qingsongite - B N | --- #205 --- Chromitite, Luobusa ophiolite, Tibet (no illustration) |
| Nodules (mantle nodules) | --- ---- --- See "xenoliths" |
| Nummulites | --- #226 --- Camerina, Eocene fossil nummulite foraminiferan, Java, Indonesia |
| Obsidian (discussed but not illustrated) | --- #237 ---
Glassy andesite ("pitchstone"), Popocatepetl volcano, Mexico |
| Odegaardite | --- #65 --- Odegaardite, metagabbro from Norway |
| Oldest rock on Earth | --- #212 --- Acasta gneiss, Northwest Territories, Canada |
| Olivine | --- ---- --- See "nesosilicates - olivine" |
| Omars - distinctive erratics | --- #74 --- Siltstone cobble, Slate Islands, N.W. Ontario |
| Ophicalcite | --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland |
| Ophiolites - chromitite - Cr | --- #205 --- Chromitite, Luobusa ophiolite, southern Tibet |
| Ophiolites - serpentinite | --- #210 --- Serpentinized mantle peridotite, Gros Morne, western Newfoundland (MM06) |
| Ophiuroids | --- ---- --- See "fossils" section |
| Orbicular texture | --- #92 --- Orbicular granite, coast of northern Chile |
| Ores | --- ---- --- See individual commodities, sulphides, etc - a few examples follow: |
| Ores - Au | --- #80 --- Pyritic gold ore, Hemlo, Ontario |
| Ores - Au | --- #95 --- Green micaceous gold ore, Hemlo, Ontario |
| Ores - Co Ni As | --- #40 --- Cobalt-nickel arsenide ore, Cobalt district, Ontario |
| Ornamental stone | --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China |
| Ornamental stone | --- #203 --- Qingtian stone, superb lapidary material from China |
| Orpiment - As | --- #180 --- Arsenic sulphides realgar and orpiment from China |
| Orpiment - As | --- #99 --- Galena, quartz and orpiment, Peru |
| Orthooclase alkali feldspar | --- ---- --- See "tectosilicates - feldspars" |
| Osmium - Os | --- #177 --- Native osmium from the Urals of Russia |
| Oxides - Al | --- #14 --- Corundum (ruby & sapphire) from India |
| Oxides - Al | --- #91 --- Grenville corundum, east of Bancroft, Ontario |
| Oxides - Cr Fe | --- #60 --- UG-2 chromitite, Bushveld complex, South Africa |
| Oxides - Fe (magnetite, ilmenite) | --- #71 --- Magnetite-rich pegmatite, Grenville province, S.E. Ontario |
| Oxides - Fe | --- #230 --- Magnetite in a pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Oxides - Fe | --- #164 --- Botryoidal hematite, iron oxide from Bou Azzer, Morocco |
| Oxides - Fe Ti - ilmenite in kimberlite | --- #222 --- Diamond indicator minerals, kimberlite |
| Oxides - water ice | --- #38 --- Ice - a mineral! |
| Oxides - Mn | --- #157 --- Manganese ores, Kalahari manganese field, South Africa |
| Oxides - Mn | --- #182 --- Manganese oxide (pyrolusite) dendrites, Atacama desert, Chile |
| Oxides - Pb | --- #113 --- Minium from Colorado and Arizona, U.S.A. |
| Oxides - Sn | --- #209 --- Rich cassiterite tin ore, Cornwall, England |
| Oxides - Ti | --- #52 --- Titaniferous metagabbro, Norway |
| Oxides- Zn Fe Mn | --- #198 --- Franklinite in fluorescent zinc ore, New Jersey, U.S.A. |
| Pegmatites - granite (tourmaline) | --- #100 --- Pegmatitic granite, Tregonning-Godolphin stock, Cornwall, England |
| Pegmatites - granite (feldspar) | --- #105 --- Amazonite feldspar from Sidamo, southern Ethiopia |
| Pegmatites - oxide metagabbro (magnetite) | --- #71 --- Oxide-rich pegmatite, Grenville province, S.E. Ontario |
| Pegmatitic granite | --- #230 --- Mica-rich pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Pelecypods | --- ---- --- See "fossils - bivalves" |
| Peony stone | --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China |
| Peperite | --- #114 --- Peperite identified in outcrop in Tigrai, Ethiopia |
| Peridotite | --- #82 --- Slickensides in peridotite, Current Lake, northwest Ontario |
| Peridotite | --- #144 --- Keweenawan peridotite, Midcontinent Rift, Eagle project, Michigan, U.S.A. |
| Peridotite | --- #210 --- Serpentinized mantle peridotite, Gros Morne, western Newfoundland (MM06) |
| Peridotite | --- #217 --- Peridotite mantle xenoliths in basalt, North China craton, Hebei, China |
| Perryite - Fe Si(no specific illustration) | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Phenocrysts - K-feldspar in granite | --- #29 --- Shap granite, Lake District, England |
| Phenocrysts - plagioclase and hornblende in andesite | --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica |
| Phenocrysts | --- #237 ---
Glassy andesite ("pitchstone"), Popocatepetl volcano, Mexico |
| Phenocrysts | --- ---- --- See also "porphyry", "porphyritic", "megacryst" |
| Philippinite (australite) tektite | --- #156 --- Historic "soccer ball" tektite from the Philippines, and others |
| Phlogopite | --- ---- --- See "phyllosilicates" |
| Phonolite | --- #161 --- Gold-silver tellurides, Colorado, U.S.A., II |
| Phosphates | --- #1 ---- Apatite & orange calcite from Renfrew County, Grenville province, Ontario |
| Phosphates | --- #2 ---- Apatite & biotite from the Bancroft area, Grenville province, Ontario |
| Phosphates | --- #107 --- Apatite and phlogopite, Palabora, South Africa |
| Phosphates | --- #199 --- Wavellite from north Devon, England |
| Phosphides - schreibersite | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Phosphides - schreibersite | --- #193 --- Agoudal IIAB iron meteorite, Morocco |
| Phyllosilicates - apophyllite | --- #134 --- Apophyllite from northern San Luis Potosi, Mexico (MM01) |
| Phyllosilicates - apophyllite | --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India |
| Phyllosilicates - dickite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Phyllosilicates - green mica - Cr | --- #35 --- Green mica in gold ore, Western Australia |
| Phyllosilicates - green mica - V | --- #95 --- Green micaceous gold ore, Hemlo, Ontario |
| Phyllosilicates - illite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Phyllosilicates - kaolinite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Phyllosilicates - micas | --- #107 --- Apatite and phlogopite, Palabora, South Africa |
| Phyllosilicates - micas - Li | --- #66 --- Lepidolite, Harding pegmatite, New Mexico, U.S.A. |
| Phyllosilicates - micas - Li | --- #202 --- Tourmaline and lepidolite from southern California, U.S.A. |
| Phyllosilicates - micas | --- #230 --- Muscovitic, pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Phyllosilicates - nacrite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Phyllosilicates - pyrophyllite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Phyllosilicates - serpentine | --- #210 --- Serpentinized mantle peridotite, Gros Morne, western Newfoundland |
| Pitchstone | --- #237 ---
Glassy andesite ("pitchstone"), Popocatepetl volcano, Mexico |
| Place names - Colorado | --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A. |
| Plagioclase feldspar | --- ---- --- See, e.g., "tectosilicates - feldspars", "anorthosites" |
| Plagioclase feldspar | --- #50 --- Calcic anorthosite, northern Ontario |
| Plagioclase feldspar | --- #17-18 Double take: igneous rocks from Earth & space |
| Platinum Group Elements - PGE (see also PGM) | --- #31 --- PGE in Rhum layered intrusion, Scotland |
| Platinum Group Mineral - PGM - Cu Sn Pd (cabriite) | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Platinum Group Mineral - PGM - Pt Sb (geversite) | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| Platinum Group Mineral - PGM - Os (native osmium) | --- #177 --- Native osmium from the Urals of Russia |
| Platinum Group Mineral - PGM - Pt As (sperrylite) | --- #81 --- Sperrylite, Sudbury, Ontario |
| Platinum Group Mineral - PGM - Pt As (sperrylite) | --- #81b -- Sperrylite, Sudbury, Ontario (.pdf, 138 kb) |
| Porcellanite (no photo) | --- #224 --- Irish stone tools made from Italian jadeitite |
| Porphyry / porphyritic | --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica |
| Porphyry / porphyritic | --- #160 --- Porphyry (volcanic tuff), ornamental stone, Dyfed, Wales |
| Pulaskite | --- #57 --- Pulaskite (syenite) from Rossland, British Columbia |
| Pyrargyrite - Ag Sb S | --- #20 --- Silver ore, Fresnillo, Zacatecas, Mexico |
| Pyrite - Fe | --- #36 --- Pyrite from Navajun, Spain |
| Pyrite - Fe | --- #42 --- Pyrite from Nanisivik, Baffin Island, Nunavut |
| Pyrite - Fe | --- #68 --- Pyrite in charnockite, Kodaikanal, south India |
| Pyrite - Fe | --- #172 --- Pyrite sun (concretion), Illinois, U.S.A. |
| Pyrite - Fe | --- #215 --- Pyrite from Balmat, New York |
| Pyrolusite - Mn | --- #182 --- Manganese oxide (pyrolusite) dendrites, Atacama desert, Chile |
| Pyrope - Mg Al garnet | --- #222 --- Diamond indicator minerals, kimberlite |
| Pyrophyllite | --- #203 --- Qingtian stone, superb lapidary material from China |
| Pyroxenes | --- ---- --- See "inosilicates - pyroxenes" |
| Pyroxmangite | --- #22 --- Pyroxmangite (`rhodonite') from Colorado, U.S.A. |
| Pyrrhotite - Fe | --- #68 --- Sulphidic charnockite, Kodaikanal, south India |
| Quartz - Si | --- ---- --- See "tectosilicates - silica" |
| Quartz (amethyst, etc) - Si | --- #206 --- Quartz as semi-precious stone: nine faceted examples (smoky quartz, rose quartz, etc) |
| Quartz-ankerite-mariposite ("QAM") rock | --- #35 --- Green mica in gold ore, Western Australia |
| Quartz veins | --- #225 --- Extensional quartz veins, Cork and Kerry, southern Ireland |
| Quartzite | --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A. |
| Qingsongite, cubic BN | --- #205 --- Chromitite, Luobusa ophiolite, Tibet (no illustration) |
| Qingtian stone | --- #203 --- Qingtian stone, superb lapidary material from China |
| Rapakivi granite texture | --- #179 --- Textures in a rapakivi granite from Beijing, China |
| Realgar - As | --- #180 --- Arsenic sulphides realgar and orpiment from China |
| Red Crag | --- #183 --- The bivalve Glycimeris in the Pliocene Red Crag of Essex, England |
| Rhodochrosite - Mn (discussion only) | --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A. |
| Rhodonite (pyroxmangite) - Mn | --- #22 --- Pyroxmangite ("rhodonite") from Colorado, U.S.A. |
| Richterite | --- #166 --- Unusual amphibole from the Grenville province, Ontario |
| Rizalite (philippinite) tektite | --- #156 --- Historic "soccer ball" tektite from the Philippines, and others |
| Roscoelite (V green mica) | --- #95 --- Green micaceous gold ore, Hemlo, Ontario |
| Rubellite (tourmaline)- B | --- #202 --- Tourmaline and lepidolite from southern California, U.S.A. |
| Rucklidgeite - Pb Bi Ag Te | --- #67 --- Rucklidgeite, rare telluride, N.E. Ontario |
| Safflorite - Co As | --- #40 --- Cobalt-nickel arsenide ore, Cobalt district, Ontario |
| Saligrams | --- #139 --- Fossil "surprise" cephalopods from Nepal |
| Sand (protolith of fulgurite) | --- #37 --- Fulgurite from Ontario |
| Scapolite | --- #90 --- Scapolite from Quebec |
| Scapolite | --- #65 --- Odegaardite, metagabbro from Norway |
| Schreibersite - Fe Ni P | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Scoria | --- #108 --- Basaltic scoria and volcanic bomb, Mount Fuji, Japan |
| Sediments - BIF | --- #88 --- Banded iron formation, Western Australia |
| Sediments - BIF | --- #98 --- Banded iron formation, south India |
| Sediments - conglomerate | --- #72 --- Palaeobeach with igneous pebbles, Cuba |
| Sediments - dolostone tempestite | --- #219 --- Tempestite - Jixian dolostone, Tianjin, China |
| Sediments - limestone | --- #168 --- Echinodermata and the lithographic stone of Solnhofen, Germany |
| Sediments - limestone with fossils | --- #208 --- Shelly Ordovician limestone, Campbellford, southeast Ontario |
| Sediments - limestone with trace fossils | --- #211 --- Tyndall stone, trace fossils, Ordovician limestone, Manitoba |
| Sediments - marl | --- #36 --- Pyrite from Navajun, Spain |
| Sediments - quartzite | --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A. |
| Sediments - sand (protolith of fulgurite) | --- #37 --- Fulgurite from Ontario |
| Sediments - sand - Red Crag | --- #183 --- The bivalve Glycimeris in the Pliocene Red Crag of Essex, England |
| Sediments - sandstone | --- #84 --- Concretion, northwest Ontario |
| Sediments - shale (black shale) | --- #172 --- Pyrite sun (concretion), Illinois, U.S.A. |
| Sediments - siltstone | --- #74 --- Siltstone cobble, Slate Islands, N.W. Ontario |
| Selenides - Cu Se | --- #61 --- Umangite: selenides from Moravia and Saskatchewan |
| Semi-precious stones | --- ---- --- cf. gemstones: see amethyst, quartz, jade, etc |
| Serpentinite | --- #210 --- Serpentinized mantle peridotite, Gros Morne, western Newfoundland (MM06) |
| Sheet silicates | --- ---- --- See "phyllosilicates" |
| Silicides - Fe Si - at least 8 species | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Silicides in fulgurite - hapkeite (no photo) - Fe Si | --- #37 --- Fulgurite from Ontario |
| Silicides - luobusaite - Fe Si | --- #205 --- Chromitite, Luobusa ophiolite, southern Tibet (no illustration) |
| Sillimanite | --- #43 --- Khondalite from Kerala, south India |
| Silver - Ag | --- ---- --- See "native elements - Ag", "tellurides" & "sulphosalts - Ag" |
| Skarn (gold) - Au | --- #153 --- Gold skarn with arsenopyrite, Osoyoos, southern Okanagan, British Columbia |
| Skarn (gold) - Au | --- #234 --- Garnet skarn, Rossland, British Columbia |
| Skarn - Mg | --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland |
| Skutterudite - Ni Co As | --- #40 --- Cobalt-nickel arsenide ore, Cobalt district, Ontario |
| Slags - Sudbury, ON | --- #3 ---- Meteorite recognition - slags |
| Slags - Sudbury, ON | --- #192 --- Nickel smelter slag, Sudbury, Ontario |
| Slags - southern Ontario | --- #27 --- Copper-rich slag, Belleville, Ontario |
| Slags - Durango, CO | --- #176 --- Slag from the Durango mining district, Colorado, U.S.A. |
| Slickensides | --- #82 --- Slickensides, northwest Ontario |
| Smithsonite - Zn | --- #195 --- Smithsonite from Tsumeb, Namibia |
| Sorosilicates - epidote | --- #50 --- Calcic anorthosite, northern Ontario |
| Sorosilicates - hemimorphite | --- #195 --- Hemimorphite from Ojuela mine, Mapimi, Durango, Mexico |
| Sperrylite - Pt As | --- #81 --- Sperrylite, Sudbury, Ontario |
| Sperrylite - Pt As | --- #81b -- Sperrylite, Sudbury, Ontario (.pdf, 138 kb) |
| Spessartine - Mn Al garnet | --- #230 --- Garnet in pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| Sphaerocobaltite | --- #132 --- Mimetite, cerussite, sphaerocobaltite, Morocco |
| Sphalerite - Zn | --- #12 --- Banded sphalerite from Nanisivik, Baffin Island, Nunavut |
| Sphalerite - Zn | --- #59 --- Sphalerite-rich ore, Lake District, N.W. England |
| Sphalerite - Zn | --- #48 --- Zinc-lead vein from the Grenville province of S.E. Ontario |
| Sphalerite - Zn | --- #148 --- Silica-flooded sulphidic ore, Mineral de Pozos, Guanajuato, Mexico |
| Sphalerite - Zn | --- #171 --- Sphalerite in Cu Ge (Zn Ga) ore, Tsumeb, Namibia |
| Sphalerite - Zn | --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A. |
| Sphalerite - Zn | --- #198 --- Sphalerite in fluorescent zinc ore, New Jersey, U.S.A. |
| Sphalerite - Zn Cd (etc) | --- #215 --- Sphalerite (zinc ore / chemistry), Long Lake, Ontario & Balmat, New York |
| Sphene | --- #167 --- Titanite (sphene) from the Grenville province, Ontario |
| Stannite group - Cu Fe Sn S | --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England |
| Stibnite - Sb | --- #10 --- Stibnite from South Africa |
| Stibnite - Sb | --- #137 --- Stibnite, antimony ore from Romania (MM04) |
| Stibnite in cinnabar - Sb Hg | --- #4 ---- Cinnabar, mercury ore from Almaden, Spain |
| Stilbite | --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India |
| Structures | --- #75 --- Shatter cone, Slate Islands, N.W. Ontario |
| Structures | --- #82 --- Slickensides, northwest Ontario |
| Structures | --- #89 --- Brecciated chert, Western Australia |
| Sudbury breccia and ejecta | --- #213 --- Impact ejecta, breccias and ore, Thunder Bay and Sudbury, Ontario |
| Suessite - Fe Si(no specific illustration) | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Sulphates - Ba | --- #228 --- Barite on quartz, Jiangxi, China |
| Sulphates - Ca | --- #165 --- Sand-infused gypsum "rose", Aransas Pass, Texas, U.S.A. |
| Sulphides - Cu | --- #115 --- Chalcopyrite ore, McCreedy West mine, Sudbury, Ontario |
| Sulphides - Cu | --- #213 --- Impact ejecta, and chalcopyrite ore, McCreedy West mine, Sudbury, Ontario |
| Sulphides - Cu | --- #190 --- Sudbury copper-PGE ore, Broken Hammer deposit |
| Sulphides - Cu | --- #171 --- Germanite in Cu Ge (Zn) ore, Tsumeb, Namibia |
| Sulphides - Cu | --- #148 --- Silica-flooded sulphidic ore, Mineral de Pozos, Guanajuato, Mexico |
| Sulphides - iss "matte" | --- #176 --- Slag from the Durango mining district, Colorado, U.S.A. |
| Sulphides - iss "matte" | --- #27 --- Copper-rich slag, Belleville, Ontario |
| Sulphides - pyrite - Fe | --- #36 --- Pyrite from Navajun, Spain |
| Sulphides - pyrite - Fe | --- #42 --- Pyrite from Nanisivik, Baffin Island, Nunavut |
| Sulphides - pyrite - Fe | --- #68 --- Sulphidic charnockite, Kodaikanal, south India |
| Sulphides - pyrite - Fe | --- #172 --- Pyrite sun (concretion), Illinois, U.S.A. |
| Sulphides - pyrrhotite - Fe | --- #68 --- Sulphidic charnockite, Kodaikanal, south India |
| Sulphides - troilite - Fe | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Sulphides - Fe As | --- #153 --- Gold skarn with arsenopyrite, Osoyoos, southern Okanagan, British Columbia |
| Sulphides - Fe Ni Cu | --- #97 --- Massive sulphide bear as folk-art carving (Sudbury, Ontario) |
| Sulphides - Hg | --- #4 ---- Cinnabar, mercury ore from Almaden, Spain |
| Sulphides - Ni | --- #5 ---- Violarite, nickel ore from Sudbury, Ontario |
| Sulphides - Pb As | --- #99 --- Galena, quartz and orpiment, Peru |
| Sulphides - As | --- #180 --- Arsenic sulphides realgar and orpiment from China |
| Sulphides - Pb Zn | --- #48 --- Zinc-lead vein from the Grenville province of S.E. Ontario |
| Sulphides - Pb Zn Ag | --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A. |
| Sulphides - Pb Zn | --- #196 --- Unusual galena habit from Madan, Bulgaria |
| Sulphides - Pb Ag | --- #200 --- Galena crystal habits, Viburnum Trend, Missouri and Keno Hill, Yukon |
| Sulphides - galena - Pb | --- #214 --- Galena crystal habits, Huanzala, Peru & Madan, Bulgaria |
| Sulphides - Sb | --- #10 --- Stibnite from South Africa |
| Sulphides - Sb | --- #137 --- Stibnite, antimony ore from Romania (MM04) |
| Sulphides - Zn | --- #12 --- Banded sphalerite from Nanisivik, Baffin Island, Nunavut |
| Sulphides - Zn | --- #59 --- Sphalerite-rich ore, Lake District, N.W. England |
| Sulphides - Zn | --- #198 --- Sphalerite in fluorescent zinc ore, New Jersey, U.S.A. |
| Sulphides - Zn Cd (etc) | --- #215 --- Sphalerite (zinc ore / chemistry), Long Lake, Ontario & Balmat, New York |
| Sulphides - Zn Cu Ge Ga | --- #171 --- Germanite in Cu Ge (Zn) ore, Tsumeb, Namibia |
| Sulphides - Zn Cu Pb Ag | --- #148 --- Silica-flooded sulphidic ore, Mineral de Pozos, Guanajuato, Mexico |
| Sulphides - stannite group - Cu Fe Sn | --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England |
| Sulphides - Zn Pb Cu | --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A. |
| Sulphosalts - Ag | --- #20 --- Silver ore, Fresnillo, Zacatecas, Mexico |
| Sulphosalts - Cu Pb Sb | --- #96 --- Bournonite from Pulacayo, Bolivia |
| Sulphosalts - Fe Sb | --- #8 ---- Berthierite, Iron-antimony sulphide from Borneo |
| Sulphosalts - Pb Sn Sb | --- #33 --- Cylindrite from Bolivia |
| Sulphosalts - Tl | --- #19 --- Thallium in nature (Utah, U.S.A.) |
| Sulphosalts - Cu Fe As S Ge | --- #171 --- Tennantite in Cu Ge ore, Tsumeb, Namibia |
| Syenites | --- #57 --- Pulaskite (syenite) from Rossland, British Columbia |
| Syenites | --- #138 --- Eudialyte syenite from Kipawa, Quebec (MM02) |
| Sylvanite - Au Ag Te | --- #161 --- Gold-silver tellurides, Colorado, U.S.A., II |
| Taenite - Ni Fe | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Tectosilicates - feldspars - antiperthite (not visible) | --- #71 --- Oxide-rich pegmatite, Grenville province, S.E. Ontario |
| Tectosilicates - microcline feldspar | --- #103 --- Amazonite feldspar from Quebec |
| Tectosilicates - microcline feldspar | --- #105 --- Amazonite feldspar from Sidamo, southern Ethiopia |
| Tectosilicates - orthoclase feldspar | --- #29 --- Shap granite, Lake District, England |
| Tectosilicates - orthoclase feldspar | --- #100 --- Pegmatitic granite from Cornwall, England |
| Tectosilicates - orthoclase feldspar | --- #179 --- Textures in a rapakivi granite from Beijing, China |
| Tectosilicates - plagioclase feldspar | --- #50 --- Calcic anorthosite, northern Ontario |
| Tectosilicates - plagioclase feldspar | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Tectosilicates - scapolite | --- #90 --- Scapolite from Quebec |
| Tectosilicates - silica | --- #6 ---- Opal in Volcanic rock from Honduras |
| Tectosilicates - silica | --- #16 --- Chert & chalcedony (Pennsylvania, U.S.A.) |
| Tectosilicates - silica | --- #23 --- Chert & microfossils (Pennsylvania, U.S.A.) |
| Tectosilicates - silica | --- #24 --- Chert provenance (Pennsylvania, U.S.A.) |
| Tectosilicates - silica | --- #34 --- Flint walls, Essex, England |
| Tectosilicates - silica (jasper) | --- #88 --- Banded iron formation, Western Australia |
| Tectosilicates - silica | --- #89 --- Brecciated chert, Western Australia |
| Tectosilicates - silica | --- #73 --- Amethyst, Thunder Bay, N.W. Ontario |
| Tectosilicates - silica | --- #76 --- Chert from the Crowe valley, S.E. Ontario |
| Tectosilicates - silica | --- #79 --- Fractured flint from Essex, England |
| Tectosilicates - quartz - pressure shadows | --- #153 --- Gold skarn with arsenopyrite, Osoyoos, southern Okanagan, British Columbia |
| Tectosilicates - quartz - Si | --- #206 --- Quartz as semi-precious stone: nine faceted examples |
| Tectosilicates - quartz veins | --- #225 --- Extensional quartz veins, Cork and Kerry, southern Ireland |
| Tektites | --- #55 --- Tektites from China |
| Tektites | --- #156 --- Historic "soccer ball" tektite from the Philippines |
| Tellurides - Au Ag Te | --- #158 --- Gold-silver tellurides, Colorado, U.S.A., I |
| Tellurides - Au Ag Te | --- #161 --- Gold-silver tellurides, Colorado, U.S.A., II |
| Tellurides - Pb Bi Ag Te | --- #67 --- Rucklidgeite, rare telluride, N.E. Ontario |
| Tempestite | --- #219 --- Tempestite - Jixian dolostone, Tianjin, China |
| Tennantite - Cu Fe As S | --- #171 --- Germanite in Cu Ge ore, Tsumeb, Namibia |
| Thalassinoides - trace fossils | --- #187 --- Thalassinoides, burrow, trace fossil from lower Chalk of Norfolk, England |
| Thalassinoides - trace fossils | --- #211 --- Tyndall stone, trace fossils, Ordovician limestone, Manitoba |
| Thallium minerals - Tl | --- #19 --- Thallium in nature (Utah, U.S.A.) |
| Thanatocoenosis - paleoecology | --- #208 --- Shelly Ordovician limestone, Campbellford, southeast Ontario |
| Thucholite | --- #64 --- Anthraxolite hydrocarbon, Sudbury, Ontario |
| Time scales | --- #212 --- Geochronology, oldest rocks, Earth history |
| Tin - Sn - cassiterite | --- #209 --- Rich cassiterite tin ore, Cornwall, England |
| Titanite | --- #167 --- Titanite (sphene) from the Grenville province, Ontario |
| Todorokite - Mn | --- #157 --- Manganese ores, Kalahari manganese field, South Africa |
| Topaz | --- #120 --- Quartz-tourmaline-topaz rock, Cornwall, England (photo, brief note) |
| Tourmaline | --- ---- --- See "borosilicates" |
| Trace fossils | --- #187 --- Thalassinoides, burrow, trace fossil from the lower Chalk of Norfolk, England |
| Trace fossils | --- #211 --- Tyndall stone, trace fossils, Ordovician limestone, Manitoba |
| Trilobites | --- ---- --- See "fossils" section |
| Troctolite | --- #31 --- Allivalite, Rhum, Scotland |
| Troilite - Fe S | --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| Troilite - Fe S | --- #116 --- Springwater pallasite meteorite, Saskatchewan |
| Troilite - Fe S | --- #135 --- Covert H5 ordinary chondrite meteorite, Kansas, U.S.A. |
| Troilite - Fe S | --- #173 --- Maslyanino iron meteorite with silicate inclusions, Russia |
| Troilite - Fe S | --- #233 --- Dronino sulphide-rich iron meteorite, Russia |
| Tuff | --- #160 --- Porphyry (volcanic tuff), ornamental stone, Dyfed, Wales |
| Tuff | --- #53 --- Halleflinta from southwest Wales |
| Tungstates - Fe Mn W | --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England |
| Tyndall stone | --- #211 --- Tyndall stone, trace fossils, Ordovician limestone, Manitoba |
| Ultramafic rocks | --- ---- --- See also "dunite", "peridotite","troctolite", "chromitite" (chromite), "xenoliths", etc |
| Ultramafic rocks | --- #144 --- Keweenawan peridotite, Midcontinent Rift, Eagle project, Michigan, U.S.A. |
| Ultramafic rocks | --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia |
| Umangite - Cu Se | --- #61 --- Umangite: selenides from Moravia and Saskatchewan |
| Uvarovite - Ca Cr garnet (formula only) | --- #234 --- Garnet skarn, Rossland, British Columbia |
| Vanadates - Pb V | --- #131 --- Vanadinite from Morocco |
| Veins - amethyst, barite - Si Ba | --- #73 --- Amethyst, Thunder Bay, N.W. Ontario |
| Veins - arsenides - Co Ni As | --- #40 --- Cobalt-nickel arsenide ore, Cobalt district, Ontario |
| Veins - chalcopyrite - Cu | --- #190 --- Sudbury copper-PGE ore, Broken Hammer deposit |
| Veins - gold - Au | --- #78 --- Native gold from Timmins, Ontario |
| Veins - quartz | --- #225 --- Extensional quartz veins, Cork and Kerry, southern Ireland |
| Veins - silver - Ag | --- #126 --- Native silver in vein, Silver Islet, Thunder Bay area, Ontario |
| Veins - silver sulphosalts - Ag | --- #20 --- Silver ore, Fresnillo, Zacatecas, Mexico |
| Veins - sperrylite - Pt As | --- #81 --- Sperrylite, Sudbury, Ontario |
| Veins - tin-tungsten ore - Fe Mn W Sn | --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England |
| Veins - zinc and lead - Pb Zn | --- #48 --- Zinc-lead vein from the Grenville province of S.E. Ontario |
| Veins - zinc-rich polymetallic - Zn | --- #148 --- Silica-flooded sulphidic ore, Mineral de Pozos, Guanajuato, Mexico |
| Vertebrate fossils | --- ---- --- See "fossils" section |
| Violarite - Ni | --- #5 ---- Violarite, nickel ore from Sudbury, Ontario |
| Volcanics | --- #62 --- Mineralized andesite, Guanajuato, Mexico |
| Volcanics | --- #108 --- Basaltic volcanic bomb, Mount Fuji, Japan |
| Volcanics | --- #114 --- Peperite identified in outcrop in Tigrai, Ethiopia |
| Volcanics | --- #130 --- Basalt, Bay of Fundy, Nova Scotia |
| Volcanics | --- #141 --- Fossiliferous basalt (no, really!) from Iceland |
| Volcanics | --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica |
| Volcanics | --- #235 --- Volcanic rocks of the Pico de Orizaba, Mexico |
| Volcanics | --- #236 ---
Porphyritic andesites, La Malinche volcano, Mexico |
| Volcanics | --- #237 ---
Glassy andesite ("pitchstone"), Popocatepetl volcano, Mexico |
| Volcanics | --- #160 --- Porphyry (volcanic tuff), ornamental stone, Dyfed, Wales |
| Volcanics - xenolithic basalt | --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia |
| Volcanics - xenolithic basalt | --- #217 --- Peridotite mantle xenoliths in basalt, North China craton, Hebei, China |
| Volcanic-like impact ejecta | --- #159 --- Lapilli tuff / cherty sediment of Sudbury impact event, central Ontario |
| Volcanic-like impact ejecta | --- #213 --- Impact ejecta, Thunder Bay, Ontario |
| Volynskite - Bi Ag Te | --- #67 --- Rucklidgeite, rare telluride, N.E. Ontario |
| Wavellite | --- #199 --- Wavellite from north Devon, England |
| Weissbergite - Tl | --- #19 --- Thallium in nature (Utah, U.S.A.) |
| Widmanstatten pattern in iron meteorites | --- #86 --- Gibeon iron meteorite, Namibia |
| Willemite - Zn | --- #198 --- Zn silicate in fluorescent zinc ore, New Jersey, U.S.A. |
| Wolframite - Fe Mn W | --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England |
| Xenoliths | --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia |
| Xenoliths | --- #217 --- Peridotite mantle xenoliths in basalt, North China craton, Hebei, China |
| Xenoliths | --- #236 ---
Microdiorite in andesite, La Malinche volcano, Mexico |
| Xifengite - Fe Si (no specific illustration) | --- #44 --- Silicides in fulgurite and ferrosilicon |
| Yakutite - C | --- #26 --- Diamond and carbonado, Siberia & Africa |
| Zebra ore / zebra rock | --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A. |
| Zeolites | --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India |
| Zinc - Zn | --- ---- --- See "sulphides" (Zn), "smithsonite", "franklinite", "willemite" |
| | |