Rock Identifier

Category

Mineral And Metamorphic Rock

Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.

Quartz (Clear Quartz and Rose Quartz variants) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz and Rose Quartz variants)

Silicon Dioxide (SiO2)

Smoky Quartz (Smoky Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Black Diamond / Black Sapphire (Carbon (C) or Corundum (Al2O3)) — mineral

Black Diamond / Black Sapphire

Carbon (C) or Corundum (Al2O3)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Aventurine (Green) (Aventurine Quartz (SiO2 + Fuchsite inclusions)) — mineral

Aventurine (Green)

Aventurine Quartz (SiO2 + Fuchsite inclusions)

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

Quartz (Gravel Pebble)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz (specifically Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold) in Matrix (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold) in Matrix

Iron Sulfide (FeS2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Herkimer Diamond in Matrix (Quartz (SiO2) in Dolostone (CaMg(CO3)2)) — sedimentary (host) / mineral (crystals)

Herkimer Diamond in Matrix

Quartz (SiO2) in Dolostone (CaMg(CO3)2)

sedimentary (host) / mineral (crystals)

Aquamarine (Beryl (Be3Al2Si6O18 with Fe2+ impurities)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with Fe2+ impurities)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Ferruginous Quartz (Iron-stained Quartz) (Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)

Ruby in Fuchsite (often sold as Ruby in Zoisite) (Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Ruby in Fuchsite (often sold as Ruby in Zoisite)

Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Zoisite with Ruby / Anyolite (Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)) — metamorphic

Zoisite with Ruby / Anyolite

Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Gneiss (Metamorphic Cobble) (Gneiss) — metamorphic

Gneiss (Metamorphic Cobble)

Gneiss

Sandstone (Clastic Sedimentary Rock (composed mostly of quartz, SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Beach Pebble) (Clastic sedimentary rock (primarily Quartz and Feldspar)) — sedimentary

Sandstone (Beach Pebble)

Clastic sedimentary rock (primarily Quartz and Feldspar)

Sandstone (likely Siltstone) (Arenite or Siltstone (high SiO2 content)) — sedimentary

Sandstone (likely Siltstone)

Arenite or Siltstone (high SiO2 content)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Gold-Bearing Quartz (Silicon Dioxide with Native Gold (SiO2 + Au)) — mineral

Gold-Bearing Quartz

Silicon Dioxide with Native Gold (SiO2 + Au)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)) — sedimentary

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Sandstone (likely Quartzose Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Sandstone (Gneissic or Banded) (Clastic Sedimentary Rock (composed predominantly of SiO2)) — sedimentary

Sandstone (Gneissic or Banded)

Clastic Sedimentary Rock (composed predominantly of SiO2)

Sandstone (Quartzose) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (primarily SiO2 with various cementing agents)) — sedimentary

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Sandstone (Arenite/Quartz Arenite) — sedimentary

Sandstone

Arenite/Quartz Arenite

Sandstone (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone

Arenite (primarily Quartz, SiO2)