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

Sandstone (Calcareous) (Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)) — sedimentary

Sandstone (Calcareous)

Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone with Trace Fossils (Arenite / Quartzwacke with Ichnofossils) — sedimentary

Sandstone with Trace Fossils

Arenite / Quartzwacke with Ichnofossils

Fossilized Bark (Lepidodendron / Sigillaria fossil impression) — fossil

Fossilized Bark

Lepidodendron / Sigillaria fossil impression

Dendritic Quartz (Silicon Dioxide (SiO2) with Manganese Oxide inclusions) — mineral

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese Oxide inclusions

Fossilized Coral (Petoskey Stone / Hexagonaria) (Hexagonaria percarinata / Rugosa coral) — fossil

Fossilized Coral (Petoskey Stone / Hexagonaria)

Hexagonaria percarinata / Rugosa coral

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

Mosasaur Tooth

Mosasauridae (likely Prognathodon or Mosasaurus species)

Fossilized Crinoid Stem in Matrix (Crinoid (Class: Crinoidea)) — fossil

Fossilized Crinoid Stem in Matrix

Crinoid (Class: Crinoidea)

Fossilized Gryphaea (Devil's Toenail) (Gryphaea arcuata (Bivalvia: Gryphaeidae)) — fossil

Fossilized Gryphaea (Devil's Toenail)

Gryphaea arcuata (Bivalvia: Gryphaeidae)

Fossilized Gastropod Shell (Gastropoda (Class)) — sedimentary

Fossilized Gastropod Shell

Gastropoda (Class)

Sandstone (Arenite (Silicon Dioxide, SiO2 based)) — sedimentary

Sandstone

Arenite (Silicon Dioxide, SiO2 based)

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

Sandstone

Clastic sedimentary rock (SiO2 primary)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Concretion (Calcareous or ferruginous concretion) — sedimentary

Concretion

Calcareous or ferruginous concretion

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

Sandstone

Arenite (composed primarily of SiO2)

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

Sandstone (likely Quartzose)

Arenite (primarily SiO2)

Bryozoan Fossil (Phylum Bryozoa (commonly known as 'moss animals')) — sedimentary

Bryozoan Fossil

Phylum Bryozoa (commonly known as 'moss animals')

Fossilized Brachiopod or Gastropod (Phylum Brachiopoda / Phylum Mollusca) — fossil

Fossilized Brachiopod or Gastropod

Phylum Brachiopoda / Phylum Mollusca

Coral Fossil (Scleractinia) (Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)) — sedimentary

Coral Fossil (Scleractinia)

Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)

Sandstone (Sandstone (Arenite)) — sedimentary

Sandstone

Sandstone (Arenite)

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

Sandstone (Quartzose)

Arenite (SiO2)

Sandstone (with potential iron mineralization) (Arenite) — sedimentary

Sandstone (with potential iron mineralization)

Arenite

Dendritic Jasper (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — sedimentary

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

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

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone (Ferruginous) (Arenite (with Goethite/Limonite cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)

Ironstone Concretion (Nutstone) (Ironstone (with High Limonite/Hematite Content)) — sedimentary

Ironstone Concretion (Nutstone)

Ironstone (with High Limonite/Hematite Content)

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Coral Fossil (Scleractinia (Fossilized Coral)) — fossil

Coral Fossil

Scleractinia (Fossilized Coral)

Seashell Fossil (Invertebrate Bivalve / Gastropod Fossil (Calcium Carbonate, CaCO3)) — fossil

Seashell Fossil

Invertebrate Bivalve / Gastropod Fossil (Calcium Carbonate, CaCO3)

Seashell Fossil (Mollusca (Bivalvia)) — fossil

Seashell Fossil

Mollusca (Bivalvia)

Ammonite Fossil (Ammonoidea) — fossil

Ammonite Fossil

Ammonoidea

Flint with Fossil (Silicon dioxide (SiO2) microcrystalline quartz with fossiliferous inclusions) — sedimentary

Flint with Fossil

Silicon dioxide (SiO2) microcrystalline quartz with fossiliferous inclusions

Crinoid Fossil (Crinoidea (Echinodermata)) — fossil

Crinoid Fossil

Crinoidea (Echinodermata)

Fossil Coral (Scleractinia / Rugosa (Silicified Coral)) — fossil

Fossil Coral

Scleractinia / Rugosa (Silicified Coral)

Fossil Coral (Hexagonaria or Rugose Coral (Fossilized Calcium Carbonate / Silica)) — fossil

Fossil Coral

Hexagonaria or Rugose Coral (Fossilized Calcium Carbonate / Silica)

Brachiopod Fossil (Phylum Brachiopoda) — fossil

Brachiopod Fossil

Phylum Brachiopoda

Orthoceras fossil (Orthoceras regulare (Cephalopoda, Orthocerida)) — fossil

Orthoceras fossil

Orthoceras regulare (Cephalopoda, Orthocerida)