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

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Greenstone Pebble (Metabasalt / Greenstone) — metamorphic

Greenstone Pebble

Metabasalt / Greenstone

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Green Slate (Greenstone) (Foliated Metamorphic Rock (rich in Chlorite/Epidote)) — metamorphic

Green Slate (Greenstone)

Foliated Metamorphic Rock (rich in Chlorite/Epidote)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite (Quartzite (SiO2-dominant rock)) — metamorphic

Quartzite

Quartzite (SiO2-dominant rock)

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)

Greenschist (Greenschist (Chlorite-Epidote-Actinolite Schist)) — metamorphic

Greenschist

Greenschist (Chlorite-Epidote-Actinolite Schist)

Greywacke with Quartz Vein (Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)) — sedimentary

Greywacke with Quartz Vein

Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Greenstone (Greenschist) — metamorphic

Greenstone

Greenschist

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock

Green Schist (Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)) — metamorphic

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Eclogite garnet in matrix (Eclogite (Garnet-Omphacite rock)) — metamorphic

Eclogite garnet in matrix

Eclogite (Garnet-Omphacite rock)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Greenstone / Graywacke (Metagraywacke (Chlorite-grade schistose rock)) — metamorphic

Greenstone / Graywacke

Metagraywacke (Chlorite-grade schistose rock)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Hag Stone (Perforated Sedimentary Rock (primarily Siltstone or Mudstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (primarily Siltstone or Mudstone)

Hag Stone (Chert/Flint with natural perforation) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Hag Stone (Chert/Flint with natural perforation)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartzite (Quartzite) — metamorphic

Quartzite

Quartzite

Hag Stone (Natural Perforated Flint or Chert (SiO2)) — sedimentary

Hag Stone

Natural Perforated Flint or Chert (SiO2)

Fossilized Syringopora (Piping Organ Coral) (Syringopora (Extinct Genus of Tabulate Coral)) — sedimentary

Fossilized Syringopora (Piping Organ Coral)

Syringopora (Extinct Genus of Tabulate Coral)

Pink Aragonite (CaCO3) — mineral

Pink Aragonite

CaCO3

Diorite (Diorite (Intermediate plutonic rock)) — igneous

Diorite

Diorite (Intermediate plutonic rock)

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

Fossilized Coral (Petoskey Stone type)

Hexagonaria percarinata (Fossilized Rugose Coral)

Quartz Vein in Greenstone (Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock) — metamorphic

Quartz Vein in Greenstone

Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

Stromatolite (Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)) — sedimentary

Stromatolite

Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) matrix with biogenic fragments) — fossil

Fossiliferous Limestone

Calcium Carbonate (CaCO3) matrix with biogenic fragments

Coral Fossil Rock (Syringopora) (Syringopora (Organ-pipe Coral fossil in Limestone matrix)) — sedimentary

Coral Fossil Rock (Syringopora)

Syringopora (Organ-pipe Coral fossil in Limestone matrix)

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Limestone (River Stone) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (River Stone)

Calcium Carbonate (CaCO3)

Crushed Limestone (Limestone (CaCO3)) — sedimentary

Crushed Limestone

Limestone (CaCO3)

Fossiliferous Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Chert (Brachiopod/Bryozoan Fossil) (Microcrystalline quartz (SiO2) with fossil inclusions) — sedimentary

Fossiliferous Chert (Brachiopod/Bryozoan Fossil)

Microcrystalline quartz (SiO2) with fossil inclusions

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)