Rock Identifier

Category

Organic (Biological Organism)

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

Learn about Organic (Biological Organism) in the encyclopedia

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Petrified Wood

Amber

Jet

Peat

Oil Shale

Pearl

Lizard Skin Jasper

Coral Rock

Opalized Wood

Moss Agate (Chalcedony (SiO2 with inclusions)) — mineral

Moss Agate

Chalcedony (SiO2 with inclusions)

Amber (Succinite (Fossilized Resin)) — gemstone

Amber

Succinite (Fossilized Resin)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Pearl (Calcium Carbonate (Aragonite) - CaCO3) — mineral

Pearl

Calcium Carbonate (Aragonite) - CaCO3

Amber (Succinite (Resin C10H16O)) — mineral

Amber

Succinite (Resin C10H16O)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Zebra Rock / Zebra Marble (Banded Limestone-Marble Transition) — metamorphic

Zebra Rock / Zebra Marble

Banded Limestone-Marble Transition

Amber (Succinite (Fossilized Tree Resin)) — mineraloid

Amber

Succinite (Fossilized Tree Resin)

Brain Coral Fossil (Family Mussidae or Merulinidae (Order Scleractinia)) — sedimentary

Brain Coral Fossil

Family Mussidae or Merulinidae (Order Scleractinia)

Amber (Succinite (fossilized tree resin)) — mineraloid

Amber

Succinite (fossilized tree resin)

Black Limestone with Calcite Veins (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Black Limestone with Calcite Veins

Limestone (Calcium Carbonate, CaCO3)

Amber (Succinite (Formula: C10H16O)) — Organic Mineraloid

Amber

Succinite (Formula: C10H16O)

Organic Mineraloid

Amber (Succinite) — Organic Mineral

Amber

Succinite

Organic Mineral

Anthracite Coal (Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)

Petrified Wood (Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)) — sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)

Fossilized Wood (Petrified Wood) (Silicified Wood (primarily quartz/chalcedony replacing organic matter)) — Sedimentary (with some aspects of mineral replacement)

Fossilized Wood (Petrified Wood)

Silicified Wood (primarily quartz/chalcedony replacing organic matter)

Sedimentary (with some aspects of mineral replacement)

Fossiliferous Jasper / Miriam Stone / Elephant Skin Jasper (Biogenic Chalcedony / Silicified Fossiliferous Limestone) — fossil

Fossiliferous Jasper / Miriam Stone / Elephant Skin Jasper

Biogenic Chalcedony / Silicified Fossiliferous Limestone

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Fossiliferous Sandstone / Mudstone (Sedimentary Rock (Clastic with Fossiliferous Inclusions)) — sedimentary

Fossiliferous Sandstone / Mudstone

Sedimentary Rock (Clastic with Fossiliferous Inclusions)

Carbonaceous Chondrite (CV3 type) (Carbonaceous Chondrite (CV3 group)) — meteorite

Carbonaceous Chondrite (CV3 type)

Carbonaceous Chondrite (CV3 group)

Coquina (Biogenic Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcium Carbonate - CaCO3)

Chert (with Quartz vein) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (with Quartz vein)

Chert (Silicon Dioxide, SiO2)

Tumbled brown quartz/chert pebble (Microcrystalline quartz (SiO₂), possibly chert or jasper) — mineral

Tumbled brown quartz/chert pebble

Microcrystalline quartz (SiO₂), possibly chert or jasper

Tumbled amber (Amber (fossilized plant resin; commonly succinite, C10H16O)) — gemstone

Tumbled amber

Amber (fossilized plant resin; commonly succinite, C10H16O)

Fossilized Shell Impression / Siltstone Fossil (Bivalvia / Brachiopoda mold in Siltstone) — fossil

Fossilized Shell Impression / Siltstone Fossil

Bivalvia / Brachiopoda mold in Siltstone

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Mixed Gemstone and Mineral Collection (Silicon Dioxide (SiO2) based minerals and others) — mineral

Mixed Gemstone and Mineral Collection

Silicon Dioxide (SiO2) based minerals and others

Fossilized Coral (Favosites) (Favosites goldfussi) — fossil

Fossilized Coral (Favosites)

Favosites goldfussi

Amber (Succinite (Fossilized Tree Resin)) — gemstone

Amber

Succinite (Fossilized Tree Resin)

Botiroidal Chalcedony or Silicified Fossil Coral (Silicon Dioxide (SiO2) - Chalcedony / Scleractinia (if fossilized)) — sedimentary

Botiroidal Chalcedony or Silicified Fossil Coral

Silicon Dioxide (SiO2) - Chalcedony / Scleractinia (if fossilized)

Moss Agate (Silicon Dioxide (SiO2) with inclusions) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Ironstone Concretion (Limonite/Goethite) (Iron oxide concretion (contains FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Iron oxide concretion (contains FeO(OH)·nH2O)

Moss Agate (Chalcedony (Silicon Dioxide, SiO2) with inclusions) — mineral

Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions

Amber (Succinicum (Formula: C10H16O)) — Mineraloid

Amber

Succinicum (Formula: C10H16O)

Tree Agate (Dendritic Agate (Silicon Dioxide, SiO2 with chlorite inclusions)) — mineral

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2 with chlorite inclusions)

Pearl (Calcium Carbonate (primarily Aragonite and Calcite), CaCO3) — mineral

Pearl

Calcium Carbonate (primarily Aragonite and Calcite), CaCO3

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Moss Agate (Chalcedony (SiO2) with inclusions of manganese or iron oxides) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Moss Agate (Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions) — mineral

Moss Agate

Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Limestone (Tufa/Travertine) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Tufa/Travertine)

Sedimentary Calcium Carbonate (CaCO3)

Concretion (Septarian Concretion (Fragmentary)) — sedimentary

Concretion

Septarian Concretion (Fragmentary)