Belemnoit Fossil (Thunderstick)
Belemnitida (Internal rostrum)
fossil
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
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Fossilized Coral
Rugose coral / Tabulate coral fossil in limestone matrix
fossil
Bivalve Fossil (Clam Shell)
Class Bivalvia
fossil
Anthracite Coal
Anthracite (Metamorphic/High-grade Coal)
sedimentary
Sandstone (with potential Concretion or Fossil fragment)
Arenite (primarily SiO2)
sedimentary
Bryozoan Fossil
Phylum Bryozoa (commonly known as 'moss animals')
sedimentary
Ammonite Fossil
Ammonoidea
fossil
Baltic Amber (Butterscotch or Egg Yolk Variety)
Fossilized Tree Resin (Succinite); Approximate formula: C10H16O
Organic Gemstone (Succinite)
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Crinoid Fossil in Limestone
Crinoidea (Phylum Echinodermata) in Calcite Matrix (CaCO3)
fossil
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Belemnoidea (Belemnite Guard)
Belemnitida (calcitic rostrum)
sedimentary
Petoskey Stone (Fossilized Coral)
Hexagonaria percarinata
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Spinosaurus Tooth
Spinosaurus aegyptiacus (fossilized in Hydroxyapatite)
sedimentary
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Exogyra or Gryphaea species)
fossil
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Limestone (Flagstone)
Fossiliferous Limestone (CaCO3)
sedimentary
Ammonite Fossil
Ammonoidea (typically preserved as Calcite or Aragonite)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Tree Agate
Dendritic Chalcedony (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Fossilized Coral (Petrified Coral)
Anthozoa (Scleractinia)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Kambaba Jasper (Crocodile Jasper)
Stromatolite (Fossilized Algae within Microcrystalline Quartz), SiO2
sedimentary
Dinosaur Claw (Dromaeosaurid)
Dromaeosaurid ungual (potential Deinonychus or Velociraptorine)
fossil
Fossilized Coral (Petoskey Stone / Chain Coral)
Scleractinia (Order) / Halysites (Genus for Chain Coral types)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Fossilized Rugose Coral (Petoskey Stone precursor)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Fossil Coral
Scleractinia (fossilized calcium carbonate)
sedimentary
Stromatolite
Cyanobacteria fossilized formation (CaCO3)
sedimentary
Dendritic Siltstone
Siltstone with Manganese Dendrites (MnO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Fossilized Coral (Petoskey Stone or similar)
Hexagonaria percarinata (Order: Rugosa)
sedimentary
Fossilized Shark Tooth (Sand Tiger)
Carcharias sp. (Fossilized Tooth)
fossil
Black Kyanite
Kyanite (Al2SiO5) with carbonaceous inclusions
mineral
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Favosites (Honeycomb Coral Fossil)
Favosites sp. (Phylum Cnidaria, Order Tabulata)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary