Fossil Coral
Scleractinia (fossilized calcium carbonate)
sedimentary
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
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Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3)
sedimentary
Ammonite Fossil
Ammonoidea (Calcium carbonate or Pyrite replacement)
sedimentary
Belemnite Fossil
Belemnitida (Order within Cephalopoda)
sedimentary
Fossil Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Trilobite Fossil
Trilobita (Class), likely Phacopid or Asaphid order
sedimentary
Ammonite Fossil
Ammonoidea (typically preserved as Calcite or Aragonite)
sedimentary
Megalodon Shark Tooth Fossil
Otodus megalodon (fossilized in sedimentary matrix)
sedimentary
Fossil Shark Tooth
Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite
fossil
Ironstone with Pyrite
Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Rugose Coral Fossil
Order Rugosa
fossil
Coquina / Shelly Sandstone
Calcareous Sandstone / Coquina
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Petrified Wood
Silicified Wood (Permineralized wood)
fossil
Amber
Succinite (Fossilized Tree Resin)
fossil
Ironstone Concretion
Siderite or Goethite Concretion
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Sandstone (likely Siltstone variety)
Arenite / Siltstone (primary mineral SiO2)
sedimentary
Fossil Shark Tooth
Carcharodon carcharias (modern/recent) or similar Lamniform fossil
fossil
Petrified Wood Agate
Silicified Wood (primarily SiO2)
fossil
Dendritic Agate
Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Enrolled Trilobite Fossil
Phylum Arthropoda, Class Trilobita (likely Calymene or Flexicalymene)
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock (primarily CaCO3 with fossil fragments)
sedimentary
Seashell (Cone Snail Shell)
Conus sp. (Calcium Carbonate, CaCO3)
fossil
Fossiliferous Limestone
Fossiliferous Carbonate Rock (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Coral
Cnidaria fossil / Calcite-replaced coral
fossil
Coral limestone / fossil coral
Biogenic calcium carbonate, chiefly aragonite or calcite (CaCO₃); likely fossilized colonial coral
fossil
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Fossilized Coral
Anthozoa (Fossilized)
Sedimentary / Fossil
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Fossiliferous Limestone (Pink/Red)
Calcium Carbonate (CaCO3) with Bioclasts
sedimentary
Fossiliferous Limestone
Bioclastic Limestone (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone with Quarzite clasts
Arenite (SiO2 based)
sedimentary
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary