Rock Identifier

Category

Igneous, Sedimentary, Metamorphic, Mineral

Browse igneous, sedimentary, metamorphic, mineral specimens identified by the Rock Identifier community.

Learn about Igneous, Sedimentary, Metamorphic, Mineral in the encyclopedia

Carbonatite

Coal

Conglomerate

Metabasalt

Cordierite Hornfels

Cordierite Hornfels

Glauconite

Quartzite Sandstone

Quartzite Sandstone

Eulysite

Migmatite

Breccia

Anthracite

Hutcheonite

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — mineral

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

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

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Chalcopyrite in Matrix (Chalcopyrite (CuFeS2)) — mineral

Chalcopyrite in Matrix

Chalcopyrite (CuFeS2)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Pyrite Nodule (Iron Sulfide (FeS2)) — mineral

Pyrite Nodule

Iron Sulfide (FeS2)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Glacial granite/granitoid boulder (Granite to granodiorite; chiefly quartz, feldspar, and biotite/hornblende) — igneous

Glacial granite/granitoid boulder

Granite to granodiorite; chiefly quartz, feldspar, and biotite/hornblende

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

Rough Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Aventurine (Silicon Dioxide (SiO2) with inclusions) — mineral

Aventurine

Silicon Dioxide (SiO2) with inclusions

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Chrysocolla (on host rock) (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)) — mineral

Chrysocolla (on host rock)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)

Plagioclase Feldspar (Plagioclase (NaAlSi3O8 - CaAl2Si2O8)) — mineral

Plagioclase Feldspar

Plagioclase (NaAlSi3O8 - CaAl2Si2O8)

Feldspar (likely Amazonite or Plagioclase) (Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate) — mineral

Feldspar (likely Amazonite or Plagioclase)

Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate

Moonstone (Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite) — mineral

Moonstone

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Red Garnet (Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)) — Mineral

Red Garnet

Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)

Strawberry Quartz (Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)) — mineral

Strawberry Quartz

Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)

Quartz Vein / Quartzite Specimens (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Quartzite Specimens

Silicon Dioxide (SiO2)

Corundum (Sapphire/Ruby in Matrix) (Corundum (Al2O3)) — mineral

Corundum (Sapphire/Ruby in Matrix)

Corundum (Al2O3)

Muscovite (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Muscovite

Muscovite (KAl2(AlSi3O10)(OH)2)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Greenschist (Greenschist (chlorite schist)) — metamorphic

Greenschist

Greenschist (chlorite schist)

Greenschist (Greenschist) — metamorphic

Greenschist

Greenschist

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

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

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Garnet (Garnet Group (e.g., Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3)) — mineral

Garnet

Garnet Group (e.g., Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3)

Weathered quartz-rich cobble, possibly quartzite or feldspar-rich granite (Quartz–feldspar aggregate; identification is uncertain from the photograph) — igneous

Weathered quartz-rich cobble, possibly quartzite or feldspar-rich granite

Quartz–feldspar aggregate; identification is uncertain from the photograph

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

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

Mica Schist

Mica Schist (primarily Muscovite or Biotite)

Greenstone (Metabasalt / Greenschist) — metamorphic

Greenstone

Metabasalt / Greenschist

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Rutilated Quartz (with Garnet pendant) (Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions) — mineral

Rutilated Quartz (with Garnet pendant)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Rutilated Quartz (Rutile in Quartz (SiO2 with TiO2 inclusions)) — mineral

Rutilated Quartz

Rutile in Quartz (SiO2 with TiO2 inclusions)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)