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

Amber (Copal) (Succiniferous Resin) — mineraloid

Amber (Copal)

Succiniferous Resin

Fossilized Rugose Coral (Horn Coral) (Order Rugosa) — fossil

Fossilized Rugose Coral (Horn Coral)

Order Rugosa

Fossilized Shark Teeth in Matrix (Cretaceous Chondrichthyes (Shark) remains in Sedimentary Matrix) — fossil

Fossilized Shark Teeth in Matrix

Cretaceous Chondrichthyes (Shark) remains in Sedimentary Matrix

Petrified Wood (Silicified wood (primarily quartz replacing organic cellulose)) — fossil

Petrified Wood

Silicified wood (primarily quartz replacing organic cellulose)

Fossiliferous Limestone (Biogenic Sedimentary Rock (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock (CaCO3)

Echinoid Fossil (Fossilized Sea Urchin) (Echinoidea) — fossil

Echinoid Fossil (Fossilized Sea Urchin)

Echinoidea

Fossil Coral (Rugose / Horn Coral) (Rugosa (Tetracoralla)) — fossil

Fossil Coral (Rugose / Horn Coral)

Rugosa (Tetracoralla)

Fossilized Stingray Mouth Plate (Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)) — fossil

Fossilized Stingray Mouth Plate

Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)

Petrified Coral (Agatized Coral) (Fossilized Anthozoa (Silicon Dioxide replacement - SiO2)) — fossil

Petrified Coral (Agatized Coral)

Fossilized Anthozoa (Silicon Dioxide replacement - SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Turtle Stone / Septarian Nodule (Fragment) (Septarian Concretion (Calcite, Aragonite, and Limestone)) — sedimentary

Turtle Stone / Septarian Nodule (Fragment)

Septarian Concretion (Calcite, Aragonite, and Limestone)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Megalodon Shark Tooth (Otodus megalodon) — fossil

Megalodon Shark Tooth

Otodus megalodon

Megalodon Shark Tooth (Otodus megalodon) — fossil

Megalodon Shark Tooth

Otodus megalodon

Fossilized Echinoid / Sea Urchin Internal Mold (Echinoidea internal cast (steinkern)) — fossil

Fossilized Echinoid / Sea Urchin Internal Mold

Echinoidea internal cast (steinkern)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Fossiliferous Limestone (with Coralline Inclusions) (Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone (with Coralline Inclusions)

Calcium Carbonate (CaCO3)

Coprolite (Coprolite) — sedimentary

Coprolite

Coprolite

Mosasaur Jaw Fossil in Matrix (Mosasaurus (family Mosasauridae) in Phosphate Sandstone) — sedimentary

Mosasaur Jaw Fossil in Matrix

Mosasaurus (family Mosasauridae) in Phosphate Sandstone

Crinoid Stem Fossil (Class Crinoidea (Phylum Echinodermata), often preserved in Limestone or Calcite (CaCO3)) — sedimentary

Crinoid Stem Fossil

Class Crinoidea (Phylum Echinodermata), often preserved in Limestone or Calcite (CaCO3)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Fossil Sand Dollar (Echinoidea) (Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)) — sedimentary

Fossil Sand Dollar (Echinoidea)

Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)

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

Stromatolite (Fossiliferous Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossilized Tabulate Coral (Honeycomb Coral) (Favosites (Order: Tabulata)) — sedimentary

Fossilized Tabulate Coral (Honeycomb Coral)

Favosites (Order: Tabulata)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Crinoid Stem Fossil (Crinoid columnal (Class Crinoidea)) — sedimentary

Crinoid Stem Fossil

Crinoid columnal (Class Crinoidea)

Fossil Shark Tooth (Cretaceous white shark type) (Squalicorax (commonly known as Crow Shark)) — Organic specimen (fossil)

Fossil Shark Tooth (Cretaceous white shark type)

Squalicorax (commonly known as Crow Shark)

Organic specimen (fossil)

Fossiliferous Limestone (Coquina) (Calcite (CaCO3) with Bioclastic inclusions) — sedimentary

Fossiliferous Limestone (Coquina)

Calcite (CaCO3) with Bioclastic inclusions

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Weathered fossiliferous limestone (Calcite-rich limestone (CaCO₃), possibly bioclastic or micritic limestone) — sedimentary

Weathered fossiliferous limestone

Calcite-rich limestone (CaCO₃), possibly bioclastic or micritic limestone

Weathered limestone or calcitic marble (Calcite-rich carbonate rock, chiefly CaCO₃; likely fossiliferous limestone, possibly weakly metamorphosed marble) — metamorphic

Weathered limestone or calcitic marble

Calcite-rich carbonate rock, chiefly CaCO₃; likely fossiliferous limestone, possibly weakly metamorphosed marble

Weathered limestone or calcareous sandstone (Likely micritic limestone (calcite, CaCO₃), possibly carbonate-rich sandstone) — sedimentary

Weathered limestone or calcareous sandstone

Likely micritic limestone (calcite, CaCO₃), possibly carbonate-rich sandstone

Jasper (likely Kambaba or Crocodile Jasper variety) (Silicon Dioxide (SiO2) with inclusions) — sedimentary

Jasper (likely Kambaba or Crocodile Jasper variety)

Silicon Dioxide (SiO2) with inclusions

Limestone with Calcite Veining (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Veining

Calcium Carbonate (CaCO3)

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

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossilized Coral (Rugose coral / Tabulate coral (Calcium carbonate, CaCO3)) — fossil

Fossilized Coral

Rugose coral / Tabulate coral (Calcium carbonate, CaCO3)

Likely limestone fragment (Limestone, predominantly calcite (CaCO₃)) — sedimentary

Likely limestone fragment

Limestone, predominantly calcite (CaCO₃)

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

Flint / Chert

Silicon Dioxide (SiO2)

Orthoceras Fossil Limestone Egg (Fossiliferous limestone containing Orthoceras (Nautiloidea) and Goniatite remains (CaCO3)) — fossil

Orthoceras Fossil Limestone Egg

Fossiliferous limestone containing Orthoceras (Nautiloidea) and Goniatite remains (CaCO3)

Fossiliferous Limestone (Biogenic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (CaCO3)

Fossil shell fragment (likely brachiopod or bivalve) (Indeterminate fossilized carbonate shell; likely Brachiopoda or Bivalvia) — fossil

Fossil shell fragment (likely brachiopod or bivalve)

Indeterminate fossilized carbonate shell; likely Brachiopoda or Bivalvia