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

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

Chert (Nodule)

Cryptocrystalline Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide cement)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (with Arkose characteristics) (Clastic sedimentary rock (SiO2 with KAlSi3O8)) — sedimentary

Sandstone (with Arkose characteristics)

Clastic sedimentary rock (SiO2 with KAlSi3O8)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (likely Quartzose Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Sandstone (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone

Arenite (primarily Quartz, SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone with Secondary Mineralization (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Secondary Mineralization

Calcium Carbonate (CaCO3)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Fossilized coral or carbonate fossil fragment (Calcareous fossil, likely colonial coral (order Hexacorallia; uncertain from image)) — fossil

Fossilized coral or carbonate fossil fragment

Calcareous fossil, likely colonial coral (order Hexacorallia; uncertain from image)

Sandstone Geode (Sedimentary Geode (Silica/Calcite composition)) — sedimentary

Sandstone Geode

Sedimentary Geode (Silica/Calcite composition)

Coquina or Fossiliferous Limestone (Fossiliferous Calcarenite (CaCO3)) — sedimentary

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Fossiliferous Limestone (Coquina-like) (Biogenic Limestone) — sedimentary

Fossiliferous Limestone (Coquina-like)

Biogenic Limestone

Fossiliferous limestone (Bioclastic limestone, predominantly calcite (CaCO₃)) — sedimentary

Fossiliferous limestone

Bioclastic limestone, predominantly calcite (CaCO₃)

Fossilized Crinoid Stem Segment (Crinoid (Phylum Echinodermata, Class Crinoidea)) — sedimentary

Fossilized Crinoid Stem Segment

Crinoid (Phylum Echinodermata, Class Crinoidea)

Fossiliferous Limestone (Biogenic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (CaCO3)

Fossiliferous Limestone (Crinoidal) (Crinoid Limestone (CaCO3 with fossil biological remains)) — sedimentary

Fossiliferous Limestone (Crinoidal)

Crinoid Limestone (CaCO3 with fossil biological remains)

Fossilized Shell in Limestone (Bivalve fossil (CaCO3) in Carbonate Sedimentary Rock) — sedimentary

Fossilized Shell in Limestone

Bivalve fossil (CaCO3) in Carbonate Sedimentary Rock

Fossiliferous Limestone with Brachiopod (Phylum Brachiopoda in Sedimentary Matrix (CaCO3)) — fossil

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in Sedimentary Matrix (CaCO3)

Fossiliferous limestone (Bioclastic carbonate rock, chiefly calcite (CaCO₃)) — sedimentary

Fossiliferous limestone

Bioclastic carbonate rock, chiefly calcite (CaCO₃)

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

Sandstone

Clastic sedimentary rock (primarily Quartz)

Fossil shark tooth (Likely fossilized shark tooth, possibly Carcharhinus or Otodus species) — fossil

Fossil shark tooth

Likely fossilized shark tooth, possibly Carcharhinus or Otodus species

Fossilized Bone (Vertebrate fossil (mineralized bone)) — fossil

Fossilized Bone

Vertebrate fossil (mineralized bone)

Amber (Succiniferous fossil resin (C10H16O)) — gemstone

Amber

Succiniferous fossil resin (C10H16O)

Amber with Inclusion (Succiniferous fossil resin (C10H16O)) — mineraloid

Amber with Inclusion

Succiniferous fossil resin (C10H16O)

Fossilized Shark Tooth (Partial) (Elasmobranchii (fossil tooth fragment)) — sedimentary

Fossilized Shark Tooth (Partial)

Elasmobranchii (fossil tooth fragment)

Amber (Succiniferous fossil resin (C10H16O)) — mineral

Amber

Succiniferous fossil resin (C10H16O)

Petrified Wood (Silicified Wood) (Silicified fossil wood (SiO2)) — metamorphic

Petrified Wood (Silicified Wood)

Silicified fossil wood (SiO2)

Fossilized Turritella Gastropod (Internal Mold) (Turritella (Fossil Gastropod Crust)) — sedimentary

Fossilized Turritella Gastropod (Internal Mold)

Turritella (Fossil Gastropod Crust)

Amber (Succiniferous fossil resin (C10H16O)) — mineraloid

Amber

Succiniferous fossil resin (C10H16O)

Amber (Succiniferous fossil resin (C10H16O)) — mineraloid

Amber

Succiniferous fossil resin (C10H16O)

Fossiliferous limestone with brachiopod or bryozoan fossils (Calcite (CaCO₃) limestone containing marine invertebrate fossils, possibly brachiopoda or bryozoa) — fossil

Fossiliferous limestone with brachiopod or bryozoan fossils

Calcite (CaCO₃) limestone containing marine invertebrate fossils, possibly brachiopoda or bryozoa

Fossiliferous Limestone (Gastropod / Crinoid Fossil Rock) (Biogenic Sedimentary Rock (CaCO3)) — fossil

Fossiliferous Limestone (Gastropod / Crinoid Fossil Rock)

Biogenic Sedimentary Rock (CaCO3)

Fossilized Brachiopod Shell / Mold (Phylum Brachiopoda (Fossilized organic matrix replaced by Silica/Calcite)) — fossil

Fossilized Brachiopod Shell / Mold

Phylum Brachiopoda (Fossilized organic matrix replaced by Silica/Calcite)

Sandstone (Ferruginous) (Arenite (with Iron Oxide)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Silicified Snail Fossil (Gastropod (likely replaced by Chalcedony/Quartz - SiO2)) — fossil

Silicified Snail Fossil

Gastropod (likely replaced by Chalcedony/Quartz - SiO2)

Fossiliferous Limestone (Biogenic Sedimentary Rock (primarily CaCO3 with fossil fragments)) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock (primarily CaCO3 with fossil fragments)

Chert / Fossilized Burrow Cast (Microcrystalline Quartz (SiO2) with Trace Carbonates) — sedimentary

Chert / Fossilized Burrow Cast

Microcrystalline Quartz (SiO2) with Trace Carbonates

Sandstone with Trace Fossils (Arenite with Ichnofossils) — sedimentary

Sandstone with Trace Fossils

Arenite with Ichnofossils