Rock Identifier

Category

Metamorphic And Sedimentary

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

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

Gneiss

Gneiss (High-grade metamorphic rock)

Tiger Iron (Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)) — metamorphic

Tiger Iron

Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Milky or Cloudy variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Pyrite (Cube variety) (Iron Sulfide (FeS2)) — mineral

Pyrite (Cube variety)

Iron Sulfide (FeS2)

Potassium Feldspar (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Schist (Micaceous Schist) (Schist (containing mainly Muscovite and Quartz)) — metamorphic

Schist (Micaceous Schist)

Schist (containing mainly Muscovite and Quartz)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Biotite (Black Mica) (Biotite (K(Mg,Fe)3AlSi3O10(OH)2)) — mineral

Biotite (Black Mica)

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

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Banded Gneiss (Gneiss (quartz-feldspar-biotite metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

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

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Anthracite Coal (Anthracite (Carbon-rich metamorphic coal)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Greenstone / Diabase Porphyry (Porphyritic Diabase (Micro-gabbro)) — Igneous

Greenstone / Diabase Porphyry

Porphyritic Diabase (Micro-gabbro)

Anthracite Coal (Anthracite (Carbon Content: 86%–98%)) — metamorphic

Anthracite Coal

Anthracite (Carbon Content: 86%–98%)

Gneiss (with Quartz and Biotite Mica) (Gneiss) — metamorphic

Gneiss (with Quartz and Biotite Mica)

Gneiss

Schist (specifically Mica Schist) (Mica Schist (primarily composed of Muscovite KAl2(AlSi3O10)(OH)2 and Biotite)) — metamorphic

Schist (specifically Mica Schist)

Mica Schist (primarily composed of Muscovite KAl2(AlSi3O10)(OH)2 and Biotite)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)) — metamorphic

Gneiss

Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)

Green Aventurine (Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Petrified Wood (Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)) — metamorphic

Petrified Wood

Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)

Banded Slate or Siltstone with Quartz/Calcite Veins (Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)) — metamorphic

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite River Stone (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Stone

Quartzite (primarily SiO2)

Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

Yellow Quartzite or Yellow Jasper (Quartzite (primarily SiO2 with Iron oxide staining)) — metamorphic

Yellow Quartzite or Yellow Jasper

Quartzite (primarily SiO2 with Iron oxide staining)

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

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Anthracite Coal (Anthracite (Carbon-rich metamorphic rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix) — Metamorphic or Igneous (context dependent)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Metamorphic or Igneous (context dependent)

Anthracite Coal (Anthracite (Carbon-rich metamorphic coal)) — sedimentary

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Mica Schist (Mica Schist (primarily Muscovite and Quartz)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Phyllite (Phyllite) — metamorphic

Phyllite

Phyllite

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)