Rock Identifier

Category

Mineral Specimen

Browse mineral specimen specimens identified by the Rock Identifier community.

Raw Diamond (Rough Uncut) (Diamond (C - pure carbon)) — mineral

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Sandstone (Quartz-rich) (Clastic sedimentary rock (SiO2 primary)) — sedimentary

Sandstone (Quartz-rich)

Clastic sedimentary rock (SiO2 primary)

Sandstone with Quarzite clasts (Arenite (SiO2 based)) — sedimentary

Sandstone with Quarzite clasts

Arenite (SiO2 based)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (lithic wacke/arenite) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (lithic wacke/arenite)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Glacial Cobble) (Arenite / Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Glacial Cobble)

Arenite / Sedimentary Rock (primarily SiO2)

Sandstone (Quartzite-rich) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

Green Onyx (Banded Calcite) (Travertine (CaCO3 - Calcium Carbonate)) — sedimentary

Green Onyx (Banded Calcite)

Travertine (CaCO3 - Calcium Carbonate)

Asphalt (Bituminous pavement fragment) (Artificial conglomerate / Bitumen-Aggregate mixture) — sedimentary

Asphalt (Bituminous pavement fragment)

Artificial conglomerate / Bitumen-Aggregate mixture

Sandstone (likely Graywacke or Arkose variant) (Clastic Sedimentary Rock (Lithic Sandstone)) — sedimentary

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

Sandstone (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Chalcedony (Botryoidal or Geode form) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal or Geode form)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (Primary mineral: SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: SiO2)

Pink Quartz (Rose Quartz) (Silicon Dioxide (SiO2)) — mineral

Pink Quartz (Rose Quartz)

Silicon Dioxide (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Quartz Geode (Water-worn) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Water-worn)

Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Granite (Pink/Red) (Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)) — igneous

Granite (Pink/Red)

Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)

Muscovite Mica (in Quartz matrix) (Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)) — mineral

Muscovite Mica (in Quartz matrix)

Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)

White Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Blue Chalcedony (Blue Lace Agate variety) (Silicon Dioxide (SiO₂)) — mineral

Blue Chalcedony (Blue Lace Agate variety)

Silicon Dioxide (SiO₂)

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

Chalcedony (Botryoidal/Tumbled Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal/Tumbled Agate)

Silicon Dioxide (SiO2)

Chalcedony (Smoky Quartz or Agate nodule fragment) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Smoky Quartz or Agate nodule fragment)

Silicon Dioxide (SiO2)

Agate (Carnelian-like) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Agate (Carnelian-like)

Chalcedony (Silicon Dioxide, SiO2)

Chalcedony Geode Fragment (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony Geode Fragment

Microcrystalline Quartz (SiO2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Blue Lace Agate (Heat-treated/Crackle Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Blue Lace Agate (Heat-treated/Crackle Quartz variety)

Silicon Dioxide (SiO2)

Banded Calcite (Mexican Onyx) (Calcite (CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcite (CaCO3)

Quartzite with Dark Mineral Inclusions (Quartzite (primarily SiO2) with accessory minerals) — metamorphic

Quartzite with Dark Mineral Inclusions

Quartzite (primarily SiO2) with accessory minerals

Tiger's Eye (specifically Blue Tiger's Eye / Falcon's Eye) (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye (specifically Blue Tiger's Eye / Falcon's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Druzy Quartz on Matrix (likely Limestone or Sandstone) (Silicon Dioxide (SiO2) with various trace impurities) — Mineral on Sedimentary Rock

Druzy Quartz on Matrix (likely Limestone or Sandstone)

Silicon Dioxide (SiO2) with various trace impurities

Mineral on Sedimentary Rock

Tiger's Eye (Silicon Dioxide with inclusions (SiO2)) — mineral

Tiger's Eye

Silicon Dioxide with inclusions (SiO2)

Peach Moonstone (Orthoclase Feldspar ((K,Na)AlSi3O8)) — mineral

Peach Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Beryl (var. Heliodor or Aquamarine) (Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)) — mineral

Beryl (var. Heliodor or Aquamarine)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

Yellow Chalcedony (Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)) — Mineral

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Mother of Pearl (Nacre) (Aragonite (layered with organic polymers), CaCO3) — mineral

Mother of Pearl (Nacre)

Aragonite (layered with organic polymers), CaCO3

Quartz (Milky or Pink-tinged) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Pink-tinged)

Silicon Dioxide (SiO2)

Dumortierite Quartz (Al7(BO3)(SiO4)3O3) — mineral

Dumortierite Quartz

Al7(BO3)(SiO4)3O3

White Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

White Quartz Pebble

Silicon Dioxide (SiO2)