Rock Identifier

Category

Mineral Specimen

Browse mineral specimen specimens identified by the Rock Identifier community.

Learn about Mineral Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Aquamarine Matrix

Aquamarine Matrix

Morganite Crystal

Morganite Crystal

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Chert (Vuggy Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Vuggy Chert)

Silicon Dioxide (SiO2)

Sandstone with Manganese Dendrites/Oxide coatings (Arenite with Pyrolusite and Romanechite (MnO2)) — sedimentary

Sandstone with Manganese Dendrites/Oxide coatings

Arenite with Pyrolusite and Romanechite (MnO2)

Coarse Sand Grain / Lithic Fragment (Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)) — sedimentary

Coarse Sand Grain / Lithic Fragment

Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Diamond (Lesedi La Rona specimen) (Diamond (Pure Carbon, C)) — mineral

Diamond (Lesedi La Rona specimen)

Diamond (Pure Carbon, C)

Porphyritic Rhyolite (Porphyritic Rhyolite (SiO2)) — igneous

Porphyritic Rhyolite

Porphyritic Rhyolite (SiO2)

Sandstone with Iron Concretion (Arenite with Limonite/Goethite Concretion) — sedimentary

Sandstone with Iron Concretion

Arenite with Limonite/Goethite Concretion

Yellow Quartz / Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Banded Chert / Cryptocrystalline Quartz (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert / Cryptocrystalline Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Green Tourmaline (Verdelite) (Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)) — gemstone

Green Tourmaline (Verdelite)

Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)

Gneiss (with Garnet) (Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)) — metamorphic

Gneiss (with Garnet)

Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

mineral/gemstone

Zoisite with Ruby (Anyolite) (Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)) — metamorphic

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Ocean Jasper (Orbicular Jasper) (Spherulitic Chalcedony (SiO2)) — sedimentary

Ocean Jasper (Orbicular Jasper)

Spherulitic Chalcedony (SiO2)

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — sedimentary

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Basalt with Hematite staining (Extrusive mafic igneous rock with Fe2O3) — igneous

Basalt with Hematite staining

Extrusive mafic igneous rock with Fe2O3

Mookaite Jasper (Silicified Radiolarite (SiO2)) — sedimentary

Mookaite Jasper

Silicified Radiolarite (SiO2)

Ruby in Marble (Corundum (Al2O3) in Calcite (CaCO3) matrix) — metamorphic

Ruby in Marble

Corundum (Al2O3) in Calcite (CaCO3) matrix

Biotite Schist with Garnet (Garnet-Biotite Schist) — metamorphic

Biotite Schist with Garnet

Garnet-Biotite Schist

Native Copper (Native Copper (Cu)) — mineral

Native Copper

Native Copper (Cu)

Moonstone (Adularia (Potassium Aluminum Silicate, KAlSi3O8)) — mineral

Moonstone

Adularia (Potassium Aluminum Silicate, KAlSi3O8)

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Granite Pebble (Granite (Phaneritic Igneous Rock)) — igneous

Granite Pebble

Granite (Phaneritic Igneous Rock)

Amethyst (Hematoid Quartz) (Silicon Dioxide (SiO2) with Ferric Iron inclusions) — mineral

Amethyst (Hematoid Quartz)

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Howlite (Dyed Turquoise) (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite (Dyed Turquoise)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Corundum (Corundum (Aluminium oxide, Al2O3)) — mineral

Corundum

Corundum (Aluminium oxide, Al2O3)

Amethyst Geode Fragment (Quartz (SiO2) with trace iron impurities) — mineral

Amethyst Geode Fragment

Quartz (SiO2) with trace iron impurities

Granite (Granite (Felsic Intrusive Igneous Rock)) — igneous

Granite

Granite (Felsic Intrusive Igneous Rock)

Kidney Stone (Medical Specimen) (Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O) — Mineral (Biogenic)

Kidney Stone (Medical Specimen)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Mineral (Biogenic)

Iron-stained Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite inclusions) — mineral

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Heart-shaped Quartz (Silicon Dioxide (SiO2)) — mineral

Heart-shaped Quartz

Silicon Dioxide (SiO2)

Carnelian (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Tumbled)

Silicon Dioxide (SiO2)

Red Jasper (Beach Pebble) (Jasper (Cryptocrystalline Quartz, SiO2)) — mineral

Red Jasper (Beach Pebble)

Jasper (Cryptocrystalline Quartz, SiO2)

Red Jasper (or Agate/Jasper mixture) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Jasper (or Agate/Jasper mixture)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Agate / Chalcedony Pebble (Silicon Dioxide (SiO2)) — mineral

Agate / Chalcedony Pebble

Silicon Dioxide (SiO2)

Amethyst (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Amethyst (Tumbled)

Silicon Dioxide (SiO2)

Tumbled Clear Quartz/Rock Crystal (Silicon Dioxide (SiO2)) — mineral

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)