Rock Identifier

Category

Mineral (Processed Alloy)

Browse mineral (processed alloy) specimens identified by the Rock Identifier community.

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Bauxite (Bauxite (Al(OH)3, AlO(OH), AlOOH)) — sedimentary

Bauxite

Bauxite (Al(OH)3, AlO(OH), AlOOH)

Dumortierite Quartz (Dumortierite in Quartz (SiO2 with Al7BO3(SiO4)3O3)) — mineral

Dumortierite Quartz

Dumortierite in Quartz (SiO2 with Al7BO3(SiO4)3O3)

Mica Schist (Mica Schist (primarily Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Exposed shoreline bedrock and sediment (Unidentified natural rock; the image does not show enough detail for a specific geological identification) — sedimentary

Exposed shoreline bedrock and sediment

Unidentified natural rock; the image does not show enough detail for a specific geological identification

Fossil Shark Tooth (Chondrichthyes (class)) — fossil

Fossil Shark Tooth

Chondrichthyes (class)

Green copper-bearing rock, possibly chrysocolla-bearing matrix (Undetermined copper-mineralized rock; green areas may include chrysocolla, malachite, or chlorite) — metamorphic

Green copper-bearing rock, possibly chrysocolla-bearing matrix

Undetermined copper-mineralized rock; green areas may include chrysocolla, malachite, or chlorite

Blue quartz-rich rock, possibly sodalite-bearing rock (Indeterminate blue silicate specimen; identification cannot be confirmed from the image) — metamorphic

Blue quartz-rich rock, possibly sodalite-bearing rock

Indeterminate blue silicate specimen; identification cannot be confirmed from the image

Blue Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

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

Tiger's Eye

Silicon Dioxide with Crocidolite inclusions (SiO2)

Quartz (Variety: Citrine or Tumbled Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz (Variety: Citrine or Tumbled Chalcedony)

Silicon Dioxide (SiO2)

Lepidolite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Gold (Gold (Au)) — mineral

Gold

Gold (Au)

Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite) (Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)) — mineral

Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)

Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Quartz with Feldspar Veining (Silica (SiO2) with Potassium Feldspar (KAlSi3O8) inclusions) — mineral

Quartz with Feldspar Veining

Silica (SiO2) with Potassium Feldspar (KAlSi3O8) inclusions

Morganite (Beryl (Be3Al2(SiO3)6)) — gemstone

Morganite

Beryl (Be3Al2(SiO3)6)

Aquamarine (Beryl) (Beryllium Aluminum Silicate - Be3Al2Si6O18) — gemstone

Aquamarine (Beryl)

Beryllium Aluminum Silicate - Be3Al2Si6O18

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Rock and Mineral Collection (Mixed Geological Specimens) — mineral

Rock and Mineral Collection

Mixed Geological Specimens

Pink Tourmaline in Quartz Matrix (Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)) — mineral

Pink Tourmaline in Quartz Matrix

Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)

Ferruginous Quartz (Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions) — mineral

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

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

Tiger's Eye

Pseudomorph of Quartz (SiO2) after Crocidolite

Man-made Synthetic Material (Costume Faux Fur) (Synthetic Polymer (Polyester/Acrylic)) — not a rock

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Small ironstone pebble (likely limonite/goethite-rich concretion) (Goethite, α-FeO(OH), with possible limonite and quartz or clay impurities) — sedimentary

Small ironstone pebble (likely limonite/goethite-rich concretion)

Goethite, α-FeO(OH), with possible limonite and quartz or clay impurities

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement)) — fossil

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pink Granite (Granite (Phaneritic intrusive rock)) — igneous

Pink Granite

Granite (Phaneritic intrusive rock)

Lepidolite (Tumbled) (K(Li,Al)3(Al,Si,4O10)(F,OH)2) — mineral

Lepidolite (Tumbled)

K(Li,Al)3(Al,Si,4O10)(F,OH)2

Bismuth (Bismuth (Bi)) — Mineral

Bismuth

Bismuth (Bi)

Pale green tumbled stone, possibly green aventurine (Likely quartz-rich aventurine (SiO₂ with fuchsite inclusions); exact identification is uncertain from the image) — mineral

Pale green tumbled stone, possibly green aventurine

Likely quartz-rich aventurine (SiO₂ with fuchsite inclusions); exact identification is uncertain from the image

Green Quartz (Aventurine or Prase) (Silicon Dioxide (SiO2) with inclusions) — mineral

Green Quartz (Aventurine or Prase)

Silicon Dioxide (SiO2) with inclusions

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Cubic Zirconia (Zirconium dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium dioxide (ZrO2)

K-Feldspar (Potassium Feldspar (Orthoclase/Microcline), KAlSi3O8) — mineral

K-Feldspar

Potassium Feldspar (Orthoclase/Microcline), KAlSi3O8

Lepidolite (K(Li,Al)3(Al,Si,V)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,V)4O10(F,OH)2

Generic Rock Fragment (Rock Fragment) — sedimentary

Generic Rock Fragment

Rock Fragment

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Limonite (Yellow Ochre) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)