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

Oil Shale

Peat

Pearl

Lizard Skin Jasper

Opalized Wood

Coral Rock

Fossilized Wood (Petrified Wood) and Associated Rocks (Silicified Wood / Xylopal) — fossil

Fossilized Wood (Petrified Wood) and Associated Rocks

Silicified Wood / Xylopal

Turquoise and Red Coral (with Grizzly Bear Claw) (Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)) — mineral

Turquoise and Red Coral (with Grizzly Bear Claw)

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)

Chert (Flint) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon dioxide (SiO2)

Pearl (Nacre (Aragonite and Conchiolin), CaCO3) — mineral

Pearl

Nacre (Aragonite and Conchiolin), CaCO3

Amber (Green variation) (Succinite) — fossil

Amber (Green variation)

Succinite

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Pearl and Garnet Glass (Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass) — mineral and glass

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

mineral and glass

Petrified Wood (Fossilized plant material (Silicon dioxide - SiO2)) — fossil

Petrified Wood

Fossilized plant material (Silicon dioxide - SiO2)

Red Coral (Corallium rubrum) — mineral

Red Coral

Corallium rubrum

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone / Fossil Fragment (Calcium Carbonate Matrix with Biogenic Inclusions (CaCO3)) — fossil

Fossiliferous Limestone / Fossil Fragment

Calcium Carbonate Matrix with Biogenic Inclusions (CaCO3)

Chert (Jasper variation) (Chert (Cryptocrystalline microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Jasper variation)

Chert (Cryptocrystalline microcrystalline Silicon Dioxide, SiO2)

Shale fragment (Shale (Laminated Mudstone)) — sedimentary

Shale fragment

Shale (Laminated Mudstone)

Amber with Organic Inclusions (Succinite (fossilized resin)) — mineraloid

Amber with Organic Inclusions

Succinite (fossilized resin)

Glauconite (Greensand) ((K, Na)(Fe3⁰, Al, Mg)₂(Si, Al)₄O₁₀(OH)₂) — sedimentary

Glauconite (Greensand)

(K, Na)(Fe3⁰, Al, Mg)₂(Si, Al)₄O₁₀(OH)₂

Chert (Flint Nodule) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Flint Nodule)

Microcrystalline quartz (SiO2)

Fossilized Shark Tooth (fragment) (Elasmobranchii (Class) fossil) — fossil

Fossilized Shark Tooth (fragment)

Elasmobranchii (Class) fossil

Chert (Cloudy Gray) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Cloudy Gray)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Banded Jasper (Silicate Mineral (Microcrystalline Quartz / SiO2)) — sedimentary

Banded Jasper

Silicate Mineral (Microcrystalline Quartz / SiO2)

Chert / Flint pebble (Microcrystalline quartz (SiO2)) — sedimentary

Chert / Flint pebble

Microcrystalline quartz (SiO2)

Chert (Flint/Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Limestone with Fossil Fragments (Bioclastic Carbonate Rock (CaCO3)) — sedimentary

Limestone with Fossil Fragments

Bioclastic Carbonate Rock (CaCO3)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert

Chert (Microcrystalline Quartz, SiO2)

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

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with fossil inclusions

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with marine fossils) — fossil

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with marine fossils

Chert / Jasper (Silicon Dioxide (SiO2)) — sedimentary

Chert / Jasper

Silicon Dioxide (SiO2)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon Dioxide (SiO2) with impurities

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

Fossiliferous Limestone (Biogenic Sedimentary Rock (Calcium Carbonate with Fossils)) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock (Calcium Carbonate with Fossils)

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Limestone with embedded fossil cross-section) — sedimentary

Fossiliferous Limestone

Limestone with embedded fossil cross-section

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert / Flint (Chert (SiO2)) — sedimentary

Chert / Flint

Chert (SiO2)

Chert (Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)