Rock Identifier

Diamond (in jewelry setting) rock specimen

Diamond (in jewelry setting)

Diamond (C - Carbon)

mineral

Sandstone (likely Arkosic) rock specimen

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (primarily SiO2 with Feldspar)

sedimentary

Diamond (in Jewelry Setting) rock specimen

Diamond (in Jewelry Setting)

Carbon (C) - Isometric-Hexoctahedral

mineral

Pyrite (Iron Pyrite) rock specimen

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

mineral

Milky Quartz rock specimen

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Granite rock specimen

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

igneous

Cullet (Slag Glass) rock specimen

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

mineraloid / anthropogenic

Limestone (specifically a Crushed Aggregate fragment) rock specimen

Limestone (specifically a Crushed Aggregate fragment)

Calcium Carbonate (CaCO3)

sedimentary

Limestone (specifically Crushed Limestone/Calcictic) rock specimen

Limestone (specifically Crushed Limestone/Calcictic)

Calcium Carbonate (CaCO3)

sedimentary

Limestone rock specimen

Limestone

Sedimentary Calcium Carbonate (CaCO3)

sedimentary

Sandstone rock specimen

Sandstone

Arenite (primarily SiO2)

sedimentary

Limestone rock specimen

Limestone

Calcium Carbonate (CaCO3)

sedimentary

Granodiorite or Diorite rock specimen

Granodiorite or Diorite

Granodiorite / Diorite

igneous

Sandstone rock specimen

Sandstone

Clastic sedimentary rock (primarily SiO2)

sedimentary

Greenstone or Chlorite Schist rock specimen

Greenstone or Chlorite Schist

Greenschist / Chlorite schist

metamorphic

Onyx (Black) and Mother of Pearl Inlay rock specimen

Onyx (Black) and Mother of Pearl Inlay

Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl

mineral

Quartz rock specimen

Quartz

Silicon dioxide (SiO2)

Mineral

Crushed Limestone rock specimen

Crushed Limestone

Sedimentary Calcium Carbonate (CaCO3)

sedimentary

Granite rock specimen

Granite

Granite

Igneous

Granite or Granodiorite (Weathered) rock specimen

Granite or Granodiorite (Weathered)

Granite

Igneous

Quartz rock specimen

Quartz

Silicon dioxide (SiO2)

mineral

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Mother of Pearl and Onyx rock specimen

Mother of Pearl and Onyx

Aragonite (Mother of Pearl) and Chalcedony (Onyx)

mineral

Quartzite rock specimen

Quartzite

Quartzite (SiO2)

metamorphic

Granite or Pegmatite with Mica rock specimen

Granite or Pegmatite with Mica

Granitoid

igneous

Granite rock specimen

Granite

Granite

Igneous

Sandstone rock specimen

Sandstone

Clastic Sedimentary Rock (composed of SiO2 grains)

sedimentary

Granite rock specimen

Granite

Granite (Phaneritic Acid Igneous Rock)

igneous

Milky Quartz rock specimen

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

mineral

Ferruginous Quartzite (Iron-stained Quartzite) rock specimen

Ferruginous Quartzite (Iron-stained Quartzite)

Quartzite with Iron oxides (FeO(OH) / Fe2O3)

metamorphic

Marble rock specimen

Marble

Recrystallized Limestone (CaCO3)

metamorphic

Quartzite with Iron Inclusions rock specimen

Quartzite with Iron Inclusions

Quartzite (largely SiO2) with Hematite/Limonite staining (Fe2O3)

metamorphic

Ferruginous Sandstone (Gozzanous) rock specimen

Ferruginous Sandstone (Gozzanous)

SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating

sedimentary

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Ferruginous Sandstone rock specimen

Ferruginous Sandstone

Arenite with Iron Oxide matrix (Fe2O3)

sedimentary

Jadeite Jade rock specimen

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

metamorphic

Jadeite (Jade) rock specimen

Jadeite (Jade)

Jadeite; NaAlSi2O6

metamorphic

Basalt (Stream-worn Cobble) rock specimen

Basalt (Stream-worn Cobble)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

igneous

Porphyry rock specimen

Porphyry

Porphyritic Andesite/Dacite

igneous

Graphic Granite rock specimen

Graphic Granite

Pegmatitic Feldspar with Quartz intergrowths

igneous

Unakite rock specimen

Unakite

Unakite Lepidolite

metamorphic

Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite) rock specimen

Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)

Orbicular Quartz Diorite / Tonalite

igneous

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