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

Fossilized Shark Tooth (Fossilised Chondrichthyes dental specimen (likely Otodus or Carcharias sp.)) — mineral

Fossilized Shark Tooth

Fossilised Chondrichthyes dental specimen (likely Otodus or Carcharias sp.)

Fossilized Shark Tooth (Otodus obliquus) (Otodus obliquus (Mineral: Fluorapatite)) — mineral

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineral: Fluorapatite)

Fossilized Shark Tooth (Scapanorhynchus (Sand Tiger Shark relative)) — sedimentary

Fossilized Shark Tooth

Scapanorhynchus (Sand Tiger Shark relative)

Dinosaur Bone (Gembone) (Agatized Dinosaur Bone (Silicified Paleo-osteoid)) — metamorphic

Dinosaur Bone (Gembone)

Agatized Dinosaur Bone (Silicified Paleo-osteoid)

Fossilized Gastropod Shell (Gastropoda (Class)) — sedimentary

Fossilized Gastropod Shell

Gastropoda (Class)

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

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with marine fossils

Fossilized Echinoid (Sea Urchin) (Echinoidea (Class), often found as calcitic fossils) — sedimentary

Fossilized Echinoid (Sea Urchin)

Echinoidea (Class), often found as calcitic fossils

Bivalve Shell (Fossil or Contemporary) (Class Bivalvie (various genera and species of clams, cockles, etc.)) — Sedimentary (Biogenic sediment or biological remain)

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Sedimentary (Biogenic sediment or biological remain)

Tumbled fossil coral (Fossilized colonial coral, commonly Favositidae or related tabulate coral) — fossil

Tumbled fossil coral

Fossilized colonial coral, commonly Favositidae or related tabulate coral

Fossil Shark Tooth (Chondrichthyes dentition (Fossilized Tooth)) — fossil

Fossil Shark Tooth

Chondrichthyes dentition (Fossilized Tooth)

Coquina / Fossiliferous Limestone (Bioclastic Limestone (CaCO3)) — sedimentary

Coquina / Fossiliferous Limestone

Bioclastic Limestone (CaCO3)

Tumbled fossil-bearing limestone or chert (Microcrystalline calcite (limestone), possibly silicified; fossil fragments visible) — fossil

Tumbled fossil-bearing limestone or chert

Microcrystalline calcite (limestone), possibly silicified; fossil fragments visible

Crinoid Stem Fossil (Crinoid (Class Crinoidea)) — fossil

Crinoid Stem Fossil

Crinoid (Class Crinoidea)

Fossil shark tooth (Likely a fossilized shark tooth, possibly *Carcharodon* or *Carcharhinus*; exact species requires provenance and close examination) — fossil

Fossil shark tooth

Likely a fossilized shark tooth, possibly *Carcharodon* or *Carcharhinus*; exact species requires provenance and close examination

Crinoid Stem Fossil (Class Crinoidea (Sea Lilies)) — sedimentary

Crinoid Stem Fossil

Class Crinoidea (Sea Lilies)

Petrified Coral Fossil (Rugose or Tabulate Coral (Hexagonaria or similar fossilized cnidarian)) — fossil

Petrified Coral Fossil

Rugose or Tabulate Coral (Hexagonaria or similar fossilized cnidarian)

Fossiliferous Limestone with Fossil Fragment (Fossiliferous Limestone (CaCO3 with organic remains)) — fossil

Fossiliferous Limestone with Fossil Fragment

Fossiliferous Limestone (CaCO3 with organic remains)

Crinoid Stem Fossil (Crinoid ossicle (phylum Echinodermata)) — fossil

Crinoid Stem Fossil

Crinoid ossicle (phylum Echinodermata)

Fossiliferous limestone (Bioclastic micrite/wackestone, likely containing crinoid or shell fragments) — sedimentary

Fossiliferous limestone

Bioclastic micrite/wackestone, likely containing crinoid or shell fragments

Weathered limestone or calcareous sandstone (Calcite-dominated carbonate rock, likely micritic limestone (CaCO₃)) — sedimentary

Weathered limestone or calcareous sandstone

Calcite-dominated carbonate rock, likely micritic limestone (CaCO₃)

Fossilized bone or tooth fragment (indeterminate vertebrate fossil) (Mineralized vertebrate skeletal material; commonly apatite, Ca₅(PO₄)₃(F,Cl,OH), partly replaced by silica or calcite) — fossil

Fossilized bone or tooth fragment (indeterminate vertebrate fossil)

Mineralized vertebrate skeletal material; commonly apatite, Ca₅(PO₄)₃(F,Cl,OH), partly replaced by silica or calcite

Fossilized Oyster Shell (Ostreidae (Calcium Carbonate - CaCO3)) — fossil

Fossilized Oyster Shell

Ostreidae (Calcium Carbonate - CaCO3)

Fossiliferous Sandstone (Fossiliferous Arenite) — sedimentary

Fossiliferous Sandstone

Fossiliferous Arenite

Fossil Shark Tooth (Sand Tiger or Mackerel Shark) (Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate) — sedimentary

Fossil Shark Tooth (Sand Tiger or Mackerel Shark)

Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate

Weathered limestone fragments (Limestone, primarily calcite (CaCO₃)) — sedimentary

Weathered limestone fragments

Limestone, primarily calcite (CaCO₃)

Slate with Fossiliferous Impressions (Metamorphosed Argillaceous Rock (Fossiliferous Slate)) — metamorphic

Slate with Fossiliferous Impressions

Metamorphosed Argillaceous Rock (Fossiliferous Slate)

Weathered limestone (Calcitic limestone, mainly calcium carbonate (CaCO₃)) — sedimentary

Weathered limestone

Calcitic limestone, mainly calcium carbonate (CaCO₃)

Ferruginous Sandstone Concretion (Ironstone Phosphorite) (Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)) — sedimentary

Ferruginous Sandstone Concretion (Ironstone Phosphorite)

Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)

Agatized fossil fragment, possibly silicified coral (Chalcedony (microcrystalline SiO₂) replacing carbonate fossil material) — fossil

Agatized fossil fragment, possibly silicified coral

Chalcedony (microcrystalline SiO₂) replacing carbonate fossil material

Sandstone (Arenite (SiO2 based with mineral cements)) — sedimentary

Sandstone

Arenite (SiO2 based with mineral cements)

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Arenite (SiO2 with various cementing minerals)) — sedimentary

Sandstone

Arenite (SiO2 with various cementing minerals)

Sandstone (Sandstone (clastic sedimentary rock)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (with iron oxide cement, Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite (with iron oxide cement, Fe2O3)

Sandstone (Red/Brown Variety) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Fossilized shell fragment (Likely a fossil mollusk shell; exact taxon cannot be determined from the image) — fossil

Fossilized shell fragment

Likely a fossil mollusk shell; exact taxon cannot be determined from the image

Polished fossil coral (likely agatized coral) (Fossilized coral; commonly silicified Scleractinia or Tabulate coral, composed mainly of microcrystalline quartz (SiO₂)) — fossil

Polished fossil coral (likely agatized coral)

Fossilized coral; commonly silicified Scleractinia or Tabulate coral, composed mainly of microcrystalline quartz (SiO₂)