Rock Identifier

Category

Metamorphic Rock (Primarily Composed Of Minerals)

Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.

Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia

Rock Salt

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Eulysite

Eulysite

Metabasalt

Metabasalt

Hornfels

Hornfels

Metagabbro

Metagabbro

Albitite

Albitite

Epidosite

Epidosite

Schist

Schist

Metarhyolite

Metarhyolite

Cordierite Hornfels

Cordierite Hornfels

Basalt Porphyry (Porphyritic Basalt) — igneous

Basalt Porphyry

Porphyritic Basalt

Garnet-Bearing Gneiss (Almandine-Garnet Gneiss) — metamorphic

Garnet-Bearing Gneiss

Almandine-Garnet Gneiss

Granite Gneiss (Gneiss (quartz-feldspar dominated)) — metamorphic

Granite Gneiss

Gneiss (quartz-feldspar dominated)

Banded Sandstone (River Pebble) (Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)) — sedimentary

Banded Sandstone (River Pebble)

Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)

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

Gneiss

Gneiss (High-grade metamorphic rock)

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

Gneiss Pebble

Gneiss (High-grade metamorphic rock)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

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

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

Limestone (CaCO3 (principally composed of Calcite)) — sedimentary

Limestone

CaCO3 (principally composed of Calcite)

Serpentinite (Serpentinite) — metamorphic

Serpentinite

Serpentinite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Greenstone (Greenschist) (Greenschist facies rock (containing chlorite, epidote, actinolite)) — metamorphic

Greenstone (Greenschist)

Greenschist facies rock (containing chlorite, epidote, actinolite)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Bauxite (Bauxite (mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))) — sedimentary

Bauxite

Bauxite (mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

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

Tiger's Eye

Silicon Dioxide with Crocidolite (SiO2)

Coquina / Fossiliferous Limestone (Fossiliferous Limestone (CaCO3)) — Sedimentary

Coquina / Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

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

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Biotite Schist (Biotite Schist) — Metamorphic

Biotite Schist

Biotite Schist

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Limestone (Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)

Potassium Feldspar (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

Limonite (Ironstone Concretion) (Limonite: FeO(OH)·nH2O) — sedimentary

Limonite (Ironstone Concretion)

Limonite: FeO(OH)·nH2O

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

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)

Limonite Concretion (Goethite-rich Concretion (FeO(OH))) — sedimentary

Limonite Concretion

Goethite-rich Concretion (FeO(OH))

Fossilized Brachiopod (Phylum Brachiopoda (likely Order Spiriferida or Orthida)) — fossil

Fossilized Brachiopod

Phylum Brachiopoda (likely Order Spiriferida or Orthida)

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

Quartz (Milky or Smoky Quartz)

Silicon Dioxide (SiO2)

White Marble (Tumbled) (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble (Tumbled)

Recrystallized Calcite (CaCO3)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Granite Pebble (Granite (Felsic intrusive igneous rock)) — igneous

Granite Pebble

Granite (Felsic intrusive igneous rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Metamorphic rock of high-grade regional metamorphism) — metamorphic

Gneiss

Metamorphic rock of high-grade regional metamorphism

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

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

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

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

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)

Granite (Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Sandstone (Wonderstone) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Wonderstone)

Clastic Sedimentary Rock (primarily SiO2)

Greenstone / Greenschist (Greenschist (metamorphosed mafic rock)) — metamorphic

Greenstone / Greenschist

Greenschist (metamorphosed mafic rock)

Sandstone (Wonderstone) (Silicified Sandstone / Orthoquartzite with Liesegang rings) — sedimentary

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

Greenstone (Greenschist (composed of chlorite, actinolite, and epidote)) — metamorphic

Greenstone

Greenschist (composed of chlorite, actinolite, and epidote)