Rock Identifier

Category

Mineralized Fossil

Browse mineralized fossil specimens identified by the Rock Identifier community.

Learn about Mineralized 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

Coral Fossil Rock (Syringopora) (Syringopora (Organ-pipe Coral fossil in Limestone matrix)) — sedimentary

Coral Fossil Rock (Syringopora)

Syringopora (Organ-pipe Coral fossil in Limestone matrix)

Coral Fossil (Favosites) (Favosites (Extinct genus of tabulate corals)) — sedimentary

Coral Fossil (Favosites)

Favosites (Extinct genus of tabulate corals)

Fossilized Syringopora (Piping Organ Coral) (Syringopora (Extinct Genus of Tabulate Coral)) — sedimentary

Fossilized Syringopora (Piping Organ Coral)

Syringopora (Extinct Genus of Tabulate Coral)

Petrified Wood (Silicified wood (SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified wood (SiO2 - Silicon Dioxide)

Fossil Shell Fragment (possibly Brachiopod or Bivalve) (Calcium Carbonate (CaCO3) - Phylum Brachiopoda or Mollusca) — sedimentary

Fossil Shell Fragment (possibly Brachiopod or Bivalve)

Calcium Carbonate (CaCO3) - Phylum Brachiopoda or Mollusca

Fossilized Sea Urchin (Echinoid) (Echinoidea (Class) - likely replaced by Calcite or Quartz) — sedimentary

Fossilized Sea Urchin (Echinoid)

Echinoidea (Class) - likely replaced by Calcite or Quartz

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

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Fossilized Favosites (Honeycomb Coral) (Favosites (extinct genus of tabulate coral)) — sedimentary

Fossilized Favosites (Honeycomb Coral)

Favosites (extinct genus of tabulate coral)

Trilobite Fossil (Flexicalymene) (Flexicalymene ouzregui) — sedimentary

Trilobite Fossil (Flexicalymene)

Flexicalymene ouzregui

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

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

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineral: Fluorapatite)

Fossiliferous Limestone (Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)

Crinoid Stem Fossil (St John's Bead) (Crinoidea (Class)) — fossil

Crinoid Stem Fossil (St John's Bead)

Crinoidea (Class)

Shale (Sedimentary rock composed of clay minerals and quartz) — sedimentary

Shale

Sedimentary rock composed of clay minerals and quartz

Pyrite Sun (Pyrite Dollar) (Iron Disulfide (FeS2)) — mineral

Pyrite Sun (Pyrite Dollar)

Iron Disulfide (FeS2)

Calamites (Calamites (Pith cast fossil)) — sedimentary

Calamites

Calamites (Pith cast fossil)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Quartz Pebble (with Manganese dendrites/staining) (Silicon Dioxide (SiO2) with Manganese Oxide impurities) — mineral

Quartz Pebble (with Manganese dendrites/staining)

Silicon Dioxide (SiO2) with Manganese Oxide impurities

Sandstone (Arenite (SiO2 dominant)) — sedimentary

Sandstone

Arenite (SiO2 dominant)

Sandstone Cobble (Arenite (Sandstone)) — sedimentary

Sandstone Cobble

Arenite (Sandstone)

Fossilized Coral (Petoskey Stone or Rugose Coral) (Antophyllum (Hexagonaria) or Scleractinia (CaCO3)) — sedimentary

Fossilized Coral (Petoskey Stone or Rugose Coral)

Antophyllum (Hexagonaria) or Scleractinia (CaCO3)

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

Sandstone

Arenite (SiO2 with various cementing minerals)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Granitic Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Granitic Gneiss

Gneiss (Metamorphic Rock)

Fossilized Bone (Permineralized Bone (Vertebrate Fossil)) — fossil

Fossilized Bone

Permineralized Bone (Vertebrate Fossil)

Fossilized Horse Tooth (Equus ferus caballus (fossilized molar/premolar)) — fossil

Fossilized Horse Tooth

Equus ferus caballus (fossilized molar/premolar)

Ironstone Matrix with Jasper / Chert (Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)) — sedimentary

Ironstone Matrix with Jasper / Chert

Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)

Sandstone (with Iron Staining) (Arenite (Silicon Dioxide, SiO2, often with iron oxides like Limonite)) — sedimentary

Sandstone (with Iron Staining)

Arenite (Silicon Dioxide, SiO2, often with iron oxides like Limonite)

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

Crinoid Stem Fossil

Crinoid (Class Crinoidea)

Chalcedony (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Tumbled)

Silicon Dioxide (SiO2)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Coal (Bituminous or sub-bituminous coal (carbonaceous rock)) — sedimentary

Coal

Bituminous or sub-bituminous coal (carbonaceous rock)

Horn Coral Fossil (Rugosa (Order Rugosa)) — fossil

Horn Coral Fossil

Rugosa (Order Rugosa)

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

Fossilized Shell Impression / Siltstone Fossil

Bivalvia / Brachiopoda mold in Siltstone

Fossilized Mosasaur Tooth (Mosasauridae (likely Prognathodon or Mosasaurus)) — fossil

Fossilized Mosasaur Tooth

Mosasauridae (likely Prognathodon or Mosasaurus)

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

Fossilized Rugose Coral (Horn Coral)

Order Rugosa

Petoskey Stone (Hexagonaria percarinata) — fossil

Petoskey Stone

Hexagonaria percarinata

Bivalve Fossil (Clam/Mollusk) (Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)) — sedimentary

Bivalve Fossil (Clam/Mollusk)

Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)

Fossilized Rugose Coral (Order Rugosa (Calcium Carbonate - CaCO3)) — sedimentary

Fossilized Rugose Coral

Order Rugosa (Calcium Carbonate - CaCO3)

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

Fossilized Coral (Petoskey Stone or similar)

Hexagonaria percarinata (Fossilized Rugose Coral)