Rock Identifier

Category

Mineral (Primary Constituent)

Browse mineral (primary constituent) specimens identified by the Rock Identifier community.

Learn about Mineral (Primary Constituent) in the encyclopedia

Coal

Priday Plume Agate

Quartz (Quartz (SiO2)) — Mineral

Quartz

Quartz (SiO2)

Lapis Lazuli (Lapis Lazuli (Metamorphic Rock containing Lazurite, Calcite, Pyrite, and Sodalite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Metamorphic Rock containing Lazurite, Calcite, Pyrite, and Sodalite)

Granite (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite (Phaneritic intrusive igneous rock) — igneous

Granite

Phaneritic intrusive igneous rock

Basalt with Xenolith (Extrusive Igneous Rock containing Mantle Xenolith) — igneous

Basalt with Xenolith

Extrusive Igneous Rock containing Mantle Xenolith

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Copper Ore Specimen (Cupriferous Rock / Malachite-bearing ore) — mineral

Copper Ore Specimen

Cupriferous Rock / Malachite-bearing ore

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Banded gneiss pebble (Gneiss, typically quartz–feldspar–mica bearing) — metamorphic

Banded gneiss pebble

Gneiss, typically quartz–feldspar–mica bearing

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Chalcopyrite ore (Chalcopyrite (CuFeS2)) — mineral

Chalcopyrite ore

Chalcopyrite (CuFeS2)

Granite (Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)) — igneous

Granite

Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)

Granite (Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8, and Mica)) — Igneous

Granite

Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8, and Mica)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Granite (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz vein in Host Rock (Crystalline Silicon Dioxide (SiO2) in Lithic Matrix) — metamorphic

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Feldspar (Potassium Feldspar (KAlSi3O8)) — mineral

Feldspar

Potassium Feldspar (KAlSi3O8)

Orthoclase Feldspar (Orthoclase (KAlSi3O8)) — mineral

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz fragment (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Native Copper (Copper (Cu)) — mineral

Native Copper

Copper (Cu)

Fossil Snail Shell (Embedded in Resin) (Gastropoda fossil) — fossil

Fossil Snail Shell (Embedded in Resin)

Gastropoda fossil

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granodiorite (Granodiorite (containing Plagioclase, Quartz, and Biotite)) — igneous

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Peridotite (Ultramafic igneous rock) — igneous

Peridotite

Ultramafic igneous rock

Glauconite Siltstone (Glauconitic siltstone / K(Fe,Al,Mg)2[(Si,Al)4O10](OH)2) — sedimentary

Glauconite Siltstone

Glauconitic siltstone / K(Fe,Al,Mg)2[(Si,Al)4O10](OH)2

Granite Pebble (Granitoid (Felsic Plutonic Rock)) — igneous

Granite Pebble

Granitoid (Felsic Plutonic Rock)

Orthoclase Feldspar (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Epidote (Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))) — metamorphic

Epidote

Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Granite (Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)) — Igneous

Granite

Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)

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

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Granite (Coarse-grained felsic plutonic rock, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende) — igneous

Granite

Coarse-grained felsic plutonic rock, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende

Quartz (likely Milky Quartz or Chalcedony) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)