Rock Identifier

Category

Igneous, Sedimentary, Metamorphic, And Mineral

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

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral
Garnet Gneiss (Gneiss containing almandine-pyrope garnet) — metamorphic

Garnet Gneiss

Gneiss containing almandine-pyrope garnet

metamorphic
Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

metamorphic
Unidentifiable Rock Fragment — Uncertain

Unidentifiable Rock Fragment

Uncertain
Biotite (Mica) (Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)) — mineral

Biotite (Mica)

Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)

mineral
Banded Gneiss (Gneiss) — metamorphic

Banded Gneiss

Gneiss

metamorphic
Banded Gneiss (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic
Sand Grain (Silica/Quartz Grain) (Silicon Dioxide (SiO2)) — sedimentary

Sand Grain (Silica/Quartz Grain)

Silicon Dioxide (SiO2)

sedimentary
Quartz chunk (Silicon dioxide (SiO2)) — mineral

Quartz chunk

Silicon dioxide (SiO2)

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

Quartz (Milky/Bull Quartz)

Silicon Dioxide (SiO2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Garnet in Host Rock (Garnet Group (A3B2(SiO4)3)) — metamorphic

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

metamorphic
Granite Gneiss (Granitic Gneiss) — Metamorphic

Granite Gneiss

Granitic Gneiss

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

metamorphic
Gneiss (with Quartzite and Biotite) (Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)) — metamorphic

Gneiss (with Quartzite and Biotite)

Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)

metamorphic
Epidote (Epidote (Ca2(Al,Fe)3(SiO4)3(OH))) — mineral

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

mineral
Greenschist (Greenschist facies metamorphic rock) — metamorphic

Greenschist

Greenschist facies metamorphic rock

metamorphic
Clear Quartz (or Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Mineral
Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Hematite

Iron(III) oxide (Fe2O3)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Gneiss (Cobble) (Gneiss) — metamorphic

Gneiss (Cobble)

Gneiss

metamorphic
Quartz (Clear/White) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear/White)

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

mineral
Almandine Garnet (Almandine [Fe3Al2(SiO4)3]) — mineral

Almandine Garnet

Almandine [Fe3Al2(SiO4)3]

mineral
Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

metamorphic
Sand (Construction Grade) (Unconsolidated siliciclastic sediment (primarily SiO2)) — sedimentary

Sand (Construction Grade)

Unconsolidated siliciclastic sediment (primarily SiO2)

sedimentary
Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

metamorphic
Sapphire (Corundum (Al2O3)) — mineral

Sapphire

Corundum (Al2O3)

mineral
Unidentifiable Specimen (Undetermined) — Unknown

Unidentifiable Specimen

Undetermined

Unknown
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Gneiss (Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)) — metamorphic

Gneiss

Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)

metamorphic