Belemnite Fossil
Belemnitida (extinct order of Cephalopods)
sedimentary
Category
Organic Specimen (Fossil)
Browse organic specimen (fossil) specimens identified by the Rock Identifier community.
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Limestone with Calcite Veining
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone or Mudstone
Sedimentary Rock
sedimentary
Coprolite
Coprolite (fossilized feces)
fossil
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Mineraloid
Travertine (likely polished limestone)
Calcite-rich carbonate rock; predominantly CaCO₃
sedimentary
Limestone River Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Mudstone/Siltstone with Liesegang Bands
Argillaceous Sedimentary Rock with Chemical Banding
sedimentary
Sandstone (lithic/arkosic)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Orthoceras Fossil
Orthoceras sp. (Extinct genus of nautiloid cephalopod)
fossil
Sandstone
Arenite (Silicon Dioxide, SiO2 based)
sedimentary
Liesegang Rings (in Sandstone or Siltstone)
Ferruginous Sandstone with Liesegang Banding
sedimentary
Fossilized Stingray Mouth Plate
Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)
fossil
Bivalve Fossil (Clam)
Class Bivalvia (Mollusca)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Dendritic Jasper
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Sandstone
Arenite
sedimentary
Orthoceras fossil
Orthoceras regulare (Cephalopoda, Orthocerida)
fossil
Orthoceras Fossil
Orthoceras regulare (Extinct Cephalopod)
fossil
Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)
Sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (SiO2 principal component)
sedimentary
Hag Stone
Perforated Flint or Chert (SiO2)
sedimentary
Amber
Succinite (C10H16O)
mineral
Sandstone
Arenite (primarily Quartz-rich sedimentary rock)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossil Coral
Hexagonaria or Rugose Coral (petoskey stone / fossilized rugose or tabulate coral)
fossil
Sandstone (likely Siltstone variety)
Arenite / Siltstone (primary mineral SiO2)
sedimentary
Shale
Fissile mudstone (rich in clay minerals and quartz)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary