Rock Identifier

Category

Organic (Anthropogenic)

Browse organic (anthropogenic) specimens identified by the Rock Identifier community.

Learn about Organic (Anthropogenic) in the encyclopedia

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Petrified Wood

Amber

Jet

Peat

Oil Shale

Pearl

Lizard Skin Jasper

Opalized Wood

Coral Rock

Greenstone (Prase / Nephrite / Serpentine mix) (Metamorphosed ultramafic rock / greenstone facies) — metamorphic

Greenstone (Prase / Nephrite / Serpentine mix)

Metamorphosed ultramafic rock / greenstone facies

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

Greenschist

Greenschist facies rock (containing chlorite, actinolite, and epidote)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Green Quartzite (Metamorphic Quartz Sandstone (SiO2)) — metamorphic

Green Quartzite

Metamorphic Quartz Sandstone (SiO2)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Quartz in Greenstone (Metamorphic rock with quartz vein (SiO2 / mixed silicates)) — metamorphic

Quartz in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Serpentine ((Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine

(Mg,Fe)3Si2O5(OH)4

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Phyllite with Quartz Vein (Metamorphic Phyllite) — metamorphic

Phyllite with Quartz Vein

Metamorphic Phyllite

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Bioclastic inclusions) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclastic inclusions

Soapstone (Steatite (primarily Talc, Mg3Si4O10(OH)2)) — metamorphic

Soapstone

Steatite (primarily Talc, Mg3Si4O10(OH)2)

Greenschist (Chlorite schist) — metamorphic

Greenschist

Chlorite schist

Mica Schist with Iron Staining (Mica Schist) — metamorphic

Mica Schist with Iron Staining

Mica Schist

Greenstone (Metamorphic Greenstone (Greenschist facies)) — metamorphic

Greenstone

Metamorphic Greenstone (Greenschist facies)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Aragonite Star Cluster (Aragonite (CaCO3)) — mineral

Aragonite Star Cluster

Aragonite (CaCO3)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Serpentine (Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)) — metamorphic

Serpentine

Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)

Schist (Schist) — metamorphic

Schist

Schist

Hag Stone (Sandstone with Boreholes) (Bored Sandstone (Sedimentary rock with lithophaga-style borings)) — sedimentary

Hag Stone (Sandstone with Boreholes)

Bored Sandstone (Sedimentary rock with lithophaga-style borings)

Greenstone (Metabasalt / Greenschist facies rock) — metamorphic

Greenstone

Metabasalt / Greenschist facies rock

Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Serpentinite (Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

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

Limestone

Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)

Graywacke (Lithic Sandstone (Graywacke)) — sedimentary

Graywacke

Lithic Sandstone (Graywacke)

Diorite (Porphyritic) (Porphyritic Diorite) — igneous

Diorite (Porphyritic)

Porphyritic Diorite

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock

Fossiliferous Limestone (Hash) (Bioclastic Grainstone / Calcarenite) — fossil

Fossiliferous Limestone (Hash)

Bioclastic Grainstone / Calcarenite

Fossilized Coral (Petoskey Stone precursor) (Hexagonaria percarinata (Fossilized Rugose Coral)) — fossil

Fossilized Coral (Petoskey Stone precursor)

Hexagonaria percarinata (Fossilized Rugose Coral)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Green Schist (Greenschist (Chlorite Schist)) — metamorphic

Green Schist

Greenschist (Chlorite Schist)

Green Schist (Greenschist (Chlorite Schist)) — metamorphic

Green Schist

Greenschist (Chlorite Schist)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn)2-3(Si, Al, Fe)2O5(OH)4

Graywacke with Quartz Veins (Argillaceous Sandstone (Graywacke)) — sedimentary

Graywacke with Quartz Veins

Argillaceous Sandstone (Graywacke)

Pegmatite (Igneous Pegmatite) — igneous

Pegmatite

Igneous Pegmatite