Turnstone Geological Services Ltd

Rock of the Month Index

Here is an alphabetical contents list, for R.O.M. 1-197 (July 2001 to November 2017).
The index is hierarchical, in that many of the items are organized into classes of rocks, mineral families, meteorites, etc.
The index needs to be extended, but already you can go straight to various mineral classes and species, elements, meteorites, fossils, tektites, fulgurites, granitoid rocks, slags, etc.
For the mineralogically- inclined, non-silicates are organized chemically (Dana) and silicates structurally (DHZ).

You can also see the full listing of the Rock of the Month feature in chronological order, or

There is also a list of all the Meteorite-related Entries on the web site, though all the meteorites "of the month" are listed below.


Classification of Sample Descriptions available on this Site
Class/Group/Family Topics
The "Rock of the Month"with select "Museum Moments" (MM)
Agrellite - Na Ca F --- #94 --- Agrellite and eudialyte, Kipawa, Quebec
Amazonite feldspar --- ---- --- See "tectosilicates - feldspars"
Amethyst - Si --- ---- --- See "tectosilicates - silica"
Amphiboles --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica
Amphiboles --- #70 --- Nephrite jade from northern British Columbia
Amphiboles --- #166 --- Unusual amphibole from the Grenville province, Ontario
Andalusite --- #128 --- Chiastolite-muscovite schist pebble, Newfoundland
Andesite --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica
Andesite --- ---- --- See "volcanics"
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
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
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
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
Azurite --- #87 --- Azurite from Spain
Basalt --- ---- --- See "volcanics"
Berthierite - Fe Sb --- #8 ---- Berthierite, Iron-antimony sulphide from Borneo
Beryl --- #186--- Prismatic beryl from China
Borosilicates - B --- #120 --- Tourmalinite from Botallack, Cornwall, England
Borosilicates - B --- #100 --- Pegmatitic granite from Cornwall, England
Borosilicates - B --- #101 --- Tourmaline-rich granitic breccia from Cornwall, England
Borosilicates - B --- #69 --- Dumortierite from Chile
Bournonite - Cu Pb Sb --- #96 --- Bournonite from Pulacayo, Bolivia
Breithauptite - Ni Sb --- #184--- Breithauptite, nickel antimonide, from Cobalt, Ontario
Cabriite - Cu Sn Pd --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia
Calaverite - Au Ag Te --- #161 --- Gold-silver tellurides, Colorado, U.S.A., II
Calcite --- ---- --- See "carbonates"
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 - 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
Chabazite --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India
Chalcopyrite - Cu --- #115 --- 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
Chert - Si --- ---- --- See "tectosilicates - silica"
Chromates - Pb Cr --- #109 --- Crocoite from Tasmania, Australia
Chrysanthemum stone --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China
Cinnabar - Hg --- #4 ---- Cinnabar, mercury ore from Almaden, Spain
Copper - Cu --- #143 --- Native "float copper" from Houghton county, Michigan, U.S.A. (MM05)
Corundum --- ---- --- See "oxides - Al"
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 - 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
Diabase --- #17-18 Double take: igneous rocks from Earth & space
Diamond - C --- #25 --- Diamonds from Africa
Diamond - C --- #26 --- Diamond and carbonado, Siberia & Africa
Diorites --- #32 --- Appinite, Strontian area, Scotland
Diorites --- #39 --- A Young plutonic rock from Borneo
Diorites --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China
Dumortierite - B --- #69 --- Dumortierite from Chile
Dunite --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia
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
Feldspars --- ---- --- See "tectosilicates - feldspars", "anorthosites", etc
Ferrosilicon - Fe Si --- #44 --- Silicides in fulgurite and ferrosilicon
Flint - Si --- ---- --- See "tectosilicates - silica"
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
Fossils --- #11 --- Fossil bryozoan from southern Ontario
Fossils --- #111 --- Graptolite fossils from Dyfed, Wales
Fossils --- #185 --- The trilobite Phacops from the Devonian of Morocco
Fossils --- #189 --- Gastropods old and new
Fossils --- #139 --- Fossil "surprise" cephalopods from Nepal
Fossils --- #163 --- Mesozoic ammonite fossil, Madagascar
Fossils --- #141 --- Bivalve fossils from Iceland
Fossils --- #183 --- The bivalve Glycimeris in the Pliocene Red Crag of Essex, England
Fossils --- #181 --- Traumatocrinus from the Triassic of Guizhou, China
Fossils --- #168 --- Echinodermata and the lithographic stone of Solnhofen, Germany
Fossils --- #187 --- Burrow, a trace fossil from the lower Chalk of Norfolk, England
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.
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 --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A.
Galena - Pb --- #196 --- Unusual galena habit from Madan, Bulgaria
Gallite - Ga --- #171 --- Germanite in Cu Ge ore, Tsumeb, Namibia
Germanium minerals - Ge --- #171 --- Germanite in Cu Ge ore, Tsumeb, Namibia
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.
Glomeroporhyritic texture --- #178 --- Glomeroporphyritic metabasite (amphibolite) from China
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 --- #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
Graphite - C --- #46 --- Graphite from the Bushveld of South Africa
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
Hausmannite - Mn --- #157 --- Manganese ores, Kalahari manganese field, South Africa
Hemimorphite - Zn --- #195 --- Hemimorphite from Ojuela mine, Mapimi, Durango, Mexico
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
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 - 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
Inosilicates - agrellite --- #94 --- Agrellite and eudialyte, Kipawa, Quebec
Inosilicates - amphiboles --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica
Inosilicates - amphiboles --- #70 --- Nephrite jade from northern British Columbia
Inosilicates - amphiboles --- #166 --- Unusual amphibole from the Grenville province, Ontario
Inosilicates - pyroxenes --- #125 --- Chrome diopside, Russia
Inosilicates - pyroxenes --- #197 --- Chrome diopside in lodranite meteorite NWA 11129, Morocco
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
Jade --- #70 --- Jade from northern British Columbia
Kamacite - Ni Fe --- #127 --- Seymchan pallasite / iron meteorite, Siberia
Khondalite --- #43 --- Khondalite from Kerala, south India
Kutnohorite - Mn --- #157 --- Manganese ores, Kalahari manganese field, South Africa
Lamprophyres --- #56 --- Lamprophyre (intermediate porphyry) from British Columbia
Lapilli tuff --- #159 --- Lapilli tuff / cherty sediment of Sudbury impact event, central Ontario
Leucogranite --- #169 --- Leucogranite textures and mineralogy
Lithographic stone --- #168 --- Echinodermata and the lithographic stone of Solnhofen, Germany
Marble --- ---- --- See "metasediments"
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 --- #43 --- Khondalite from Kerala, south India
Metasediments --- #51 --- Forsterite marble, Scotland
Metasediments --- #58 --- Marbles of the Grenville province, S.E. Ontario
Metasediments --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland
Metasediments --- #128 --- Chiastolite-muscovite schist pebble, Newfoundland
Metavolcanics --- #53 --- Halleflinta from southwest Wales
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
Meteorites - achondrites - HED --- #104 --- Dhofar 485 howardite meteorite, Oman
Meteorites - achondrites - LOD --- #197 --- Lodranite NWA 11129, an achondrite meteorite, 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 - CO3 --- #170 --- NWA 6136 CO3 carbonaceous chondrite, Morocco
Meteorites - chondrites - CV3 --- #136 --- Allende CV3 carbonaceous chondrite meteorite, Mexico
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 - L3 --- #49 --- Moorabie L3.8 chondrite, a meteorite from N.S.W., Australia
Meteorites - chondrites - L3-6 --- #83 --- NWA 869 chondrite meteorite, Morocco
Meteorites - chondrites - L4 --- #154 --- Classification of an NWA (Northwest Africa) "black chondrite" meteorite
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 - 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
Micas --- ---- --- See "phyllosilicates"
Mimetite - Pb As --- #132 --- Mimetite, cerussite, sphaerocobaltite, Morocco
Minium - Pb --- #113 --- Minium from Colorado and Arizona, U.S.A.
Mudan stone --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China
Native elements - Ag --- #126 --- Native silver in vein, Silver Islet, Thunder Bay area, Ontario
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 - 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 - Os --- #177 --- Native osmium from the Urals of Russia
Nephrite jade --- #70 --- Jade from northern British Columbia
Nesosilicates - hemimorphite --- #195 --- Smithsonite from Tsumeb, Namibia
Nesosilicates - olivine --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia
Nesosilicates - olivine --- #31 --- Allivalite, Rhum, Scotland
Nesosilicates - olivine --- #49 --- Moorabie L3.8 chondrite, a meteorite from N.S.W., Australia
Nesosilicates - olivine --- #127 --- Seymchan pallasite / iron meteorite, Siberia
Nesosilicates - titanite --- #167 --- Titanite (sphene) from the Grenville province, Ontario
Olivine --- ---- --- See "nesosilicates - olivine"
Ophicalcite --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland
Ores - Au --- #80 --- Pyritic gold ore, Hemlo, Ontario
Ores - Au --- #95 --- Green micaceous gold ore, Hemlo, Ontario
Orpiment - As --- #180 --- Arsenic sulphides realgar and orpiment from China
Orpiment - As --- #99 --- Galena, quartz and orpiment, Peru
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 --- #164 --- Botryoidal hematite, iron oxide from Bou Azzer, Morocco
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.
Peony stone --- #178 --- Glomeroporphyritic amphibolitic diorite porphyry from China
Peperite --- #114 --- Peperite identified in outcrop in Tigrai, Ethiopia
Peridotite --- #82 --- Slickensides, northwest Ontario
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
Phosphides - schreibersite --- #127 --- Seymchan pallasite / iron meteorite, Siberia
Phyllosilicates - apophyllite --- #134 --- Apophyllite from northern San Luis Potosi, Mexico (MM01)
Phyllosilicates - apophyllite --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India
Phyllosilicates - green mica - Cr --- #35 --- Green mica in gold ore, Western Australia
Phyllosilicates - green mica - V --- #95 --- Green micaceous gold ore, Hemlo, Ontario
Phyllosilicates - micas --- #107 --- Apatite and phlogopite, Palabora, South Africa
Phyllosilicates - micas - Li --- #66 --- Lepidolite, Harding pegmatite, New Mexico
Plagioclase feldspars --- ---- --- See, e.g., "tectosilicates - feldspars", "anorthosites"
Platinum Group Mineral - Cu Sn Pd --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia
Platinum Group Mineral - Os --- #177 --- Native osmium from the Urals of Russia
Platinum Group Mineral - Pt As --- #81 --- Sperrylite, Sudbury, Ontario
Platinum Group Mineral - Pt As --- #81b -- Sperrylite, Sudbury, Ontario (.pdf, 138 kb)
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.
Pyrolusite - Mn --- #182 --- Manganese oxide (pyrolusite) dendrites, Atacama desert, Chile
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"
Quartzite --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A.
Rapakivi granite texture --- #179 --- Textures in a rapakivi granite from Beijing, China
Realgar - As --- #180 --- Arsenic sulphides realgar and orpiment from China
Richterite --- #166 --- Unusual amphibole from the Grenville province, Ontario
Rucklidgeite - Pb Bi Ag Te --- #67 --- Rucklidgeite, rare telluride, N.E. Ontario
Scapolite --- #90 --- Scapolite from Quebec
Schreibersite - Fe Ni P --- #127 --- Seymchan pallasite / iron meteorite, Siberia
Sediments - BIF --- #88 --- Banded iron formation, Western Australia
Sediments - BIF --- #98 --- Banded iron formation, south India
Sediments - limestone --- #168 --- Echinodermata and the lithographic stone of Solnhofen, Germany
Sediments - siltstone --- #74 --- Siltstone cobble, Slate Islands, N.W. Ontario
Sediments - sandstone --- #84 --- Concretion, northwest Ontario
Sediments - quartzite --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A.
Sediments - conglomerate --- #72 --- Palaeobeach with igneous pebbles, Cuba
Selenides - Cu Se --- #61 --- Umangite: selenides from Moravia and Saskatchewan
Silicides - Fe Si --- #44 --- Silicides in fulgurite and ferrosilicon
Silver - Ag --- ---- --- See "native elements - Ag", "tellurides" & "sulphosalts - Ag"
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.
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)
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 --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A.
Sphene --- #167 --- Titanite (sphene) from the Grenville province, Ontario
Stibnite - Sb --- #10 --- Stibnite from South Africa
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
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 --- #190 --- Sudbury copper-PGE ore, Broken Hammer deposit
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 - 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 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 - 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 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 --- #103 --- Amazonite feldspar from Quebec
Tectosilicates - feldspars --- #105 --- Amazonite feldspar from Sidamo, southern Ethiopia
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 --- #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
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
Tennantite - Cu Fe As S --- #171 --- Germanite in Cu Ge ore, Tsumeb, Namibia
Thallium minerals - Tl --- #19 --- Thallium in nature (Utah, U.S.A.)
Titanite --- #167 --- Titanite (sphene) from the Grenville province, Ontario
Todorokite - Mn --- #157 --- Manganese ores, Kalahari manganese field, South Africa
Tourmaline --- ---- --- See "borosilicates"
Trace fossil --- #187 --- Burrow, trace fossil from the lower Chalk of Norfolk, England
Troctolite --- #31 --- Allivalite, Rhum, Scotland
Troilite - Fe S --- #127 --- Seymchan pallasite / iron meteorite, Siberia
Tungstates - Fe Mn W --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England
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
Vanadates - Pb V --- #131 --- Vanadinite from Morocco
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 --- #159 --- Lapilli tuff / cherty sediment of Sudbury impact event, central Ontario
Volcanics --- #160 --- Porphyry (volcanic tuff), ornamental stone, Dyfed, Wales
Weissbergite - Tl --- #19 --- Thallium in nature (Utah, U.S.A.)
Wolframite - Fe Mn W --- #152 --- Quartz-wolframite vein (tin-tungsten ore) in greisen, Cligga Head, Cornwall, England
Xenolith --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia
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

Provenance of the first 194 rocks of the month can be summarized as follows: Wilson/Turnstone collection 154 (79%);
museums and assorted private individual and corporate collections 29 (15%);
and outcrops, building stones and decorative stones, in situ 11 (6%).
The in-house suite was variously self-collected (37%), purchased (33%) or donated (9%).

Document prepared 15-16,24-30 November 2014, last modified 09 November 2017 (386 line items from 197 ROM)


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