Rock Identifier

Category

Fossil

Browse fossil specimens identified by the Rock Identifier community.

Learn about Fossil in the encyclopedia

Fossil Opal

Bone Opal

Turritella Jasper

Amber

Fossiliferous Limestone

Fossiliferous Limestone

Turritella Agate

Turritella Agate

Petrified Wood

Diatomite

Guano

Jet

Diatomaceous Earth

Opalized Wood

Fossiliferous limestone pebble (Bioclastic limestone, chiefly calcite (CaCO₃)) — sedimentary

Fossiliferous limestone pebble

Bioclastic limestone, chiefly calcite (CaCO₃)

Fossiliferous Limestone (Biomicrite / Limestone with fossils) — sedimentary

Fossiliferous Limestone

Biomicrite / Limestone with fossils

Fossilized bivalve shell (Bivalvia indeterminate; likely a fossil cockle or clam shell, aragonite/calcite replaced or preserved) — fossil

Fossilized bivalve shell

Bivalvia indeterminate; likely a fossil cockle or clam shell, aragonite/calcite replaced or preserved

Olive Sea Shell Fossil (Oliva sp. (Calcium Carbonate, CaCO3)) — fossil

Olive Sea Shell Fossil

Oliva sp. (Calcium Carbonate, CaCO3)

Fossilized Echinoid (Echinoidea (likely of the order Echinoidea)) — fossil

Fossilized Echinoid

Echinoidea (likely of the order Echinoidea)

Limestone (Calcium carbonate (CaCO3)) — sedimentary

Limestone

Calcium carbonate (CaCO3)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Organic Inclusions) — fossil

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Organic Inclusions

Shiva Eye Shell Fossil (Operculum) (Turbo marmoratus (Operculum)) — fossil

Shiva Eye Shell Fossil (Operculum)

Turbo marmoratus (Operculum)

Sandstone (lithic/quartz variant) (Clastic sedimentary rock (SiO2 predominant)) — sedimentary

Sandstone (lithic/quartz variant)

Clastic sedimentary rock (SiO2 predominant)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (SiO2 based clastic rock)) — sedimentary

Sandstone

Arenite (SiO2 based clastic rock)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Arenite (SiO2, often with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone

Arenite (SiO2, often with CaCO3 or Fe2O3 cement)

Sandstone (likely Red/Brown Sandstone) (Arenite (SiO2 based)) — sedimentary

Sandstone (likely Red/Brown Sandstone)

Arenite (SiO2 based)

Fossiliferous Limestone (Carbonate sedimentary rock (CaCO3)) — sedimentary

Fossiliferous Limestone

Carbonate sedimentary rock (CaCO3)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Iron Oxide staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide staining)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Arenite (SiO2 based typically)) — sedimentary

Sandstone

Arenite (SiO2 based typically)

Sandstone (Ferruginous) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Sandstone (Quartz-rich) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartz-rich)

Arenite (composed primarily of SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Fossilized shell or brachiopod (Likely a calcareous brachiopod or bivalve fossil; exact identification requires clearer detail and scale) — fossil

Fossilized shell or brachiopod

Likely a calcareous brachiopod or bivalve fossil; exact identification requires clearer detail and scale

Fossilized turtle shell fragment (Testudines indeterminate; shell bone permineralized with silica/carbonate minerals) — fossil

Fossilized turtle shell fragment

Testudines indeterminate; shell bone permineralized with silica/carbonate minerals

Fossilized Coral (Hexagonaria (Rugose and Tabulate coral fossils)) — fossil

Fossilized Coral

Hexagonaria (Rugose and Tabulate coral fossils)

Fossil Shark Tooth (Carcharhiniformes fossil (likely Carcharhinidae family)) — fossil

Fossil Shark Tooth

Carcharhiniformes fossil (likely Carcharhinidae family)

Fossil coral fragment (probable) (Recrystallized fossil coral, commonly scleractinian or tabulate coral; exact identification requires magnification and locality) — fossil

Fossil coral fragment (probable)

Recrystallized fossil coral, commonly scleractinian or tabulate coral; exact identification requires magnification and locality

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

Fossiliferous Limestone (Hash)

Bioclastic Grainstone / Calcarenite

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Coral Fossil (Favosites) (Favosites (order Tabulata)) — fossil

Coral Fossil (Favosites)

Favosites (order Tabulata)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Petrified Wood (Silicified Wood (primarily SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Coal (Anthracite or Bituminous) (Carbon (C) with varying hydrocarbon and mineral impurities) — sedimentary

Coal (Anthracite or Bituminous)

Carbon (C) with varying hydrocarbon and mineral impurities

Sandstone Cobble (Arenite (predominantly Quartz Sandstone)) — sedimentary

Sandstone Cobble

Arenite (predominantly Quartz Sandstone)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (primarily Chalcedony or Quartz, SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Chalcedony or Quartz, SiO2)

Fossilized Coral (Petoskey Stone type) (Hexagonaria percarinata (Order: Rugosa)) — sedimentary

Fossilized Coral (Petoskey Stone type)

Hexagonaria percarinata (Order: Rugosa)

Orthoceras Fossil in Limestone (Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone) — sedimentary

Orthoceras Fossil in Limestone

Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)