Fossiliferous Limestone
Limestone with embedded fossil cross-section
sedimentary
Category
Organic Gemstone (Fossilized Resin)
Browse organic gemstone (fossilized resin) specimens identified by the Rock Identifier community.
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Fossilized Bone
Petrified Bone (Fluorapatite / Calcium Phosphate replacement)
fossil
Megalodon Shark Tooth
Otodus megalodon
fossil
Fossilized Tooth
Vertebrate Fossilized Tooth (Mineralized Biogenic Material)
fossil
Fossilized Shark Tooth (Fragment)
Elasmobranchii (fossilized tooth)
fossil
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Fossilized Bone
Permineralized Vertebrate Fossil
sedimentary
Fossilized Coral
Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)
sedimentary
Fossiliferous Limestone
Calcium carbonate matrix with macrofossils (CaCO3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Fossilized Brachiopod
Brachiopoda (Phylum)
fossil
Mammoth Tooth
Mammuthus tooth
fossil
Ironstone Concretion (Limonite/Goethite)
Iron oxide concretion (contains FeO(OH)·nH2O)
sedimentary
Fossil-bearing sedimentary rock, possibly fossil wood or bone
Indeterminate silicified/carbonate fossil in sandstone or mudstone
fossil
Mosasaur Tooth Fossil
Mosasaurus sp.
fossil
Fossilized Bone
Permineralized Bone (Vertebrate Fossil)
fossil
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Fossilized Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Fossilized Coral
Cnidaria fossil / Calcite-replaced coral
fossil
Fossilized Vertebra
Chordata fossil (Vertebra)
fossil
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Shark Tooth Fossil
Carcharodonta (order Lamniformes), likely Carcharias spp.
fossil
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions
Mineral
Petrified Bone (Fossil Bone)
Per mineralization fossil bone (varies by organism, predominantly replacement by SiO2 - Quartz/Chalcedony)
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth (Chondrichthyes)
fossil
Fossil bivalve shell
Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features
fossil
Fossilized Shark Teeth
Otodus sp. (Eocene Sand Tiger/Mackerel Shark)
fossil
Petrified Wood / Fossilized Bone
Silicified / Mineralized Fossil (Silica SiO2)
fossil
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossilized Shark Tooth (Carcharocles/Otodus or Sand Tiger Shark Tooth)
Elasmobranchii (Fossilized Tooth)
fossil
Chalcedony in Matrix (likely Agatized Coral or Chert)
Silicon Dioxide (SiO2)
sedimentary
Oyster Shell Fragment
Crassostrea virginica (or related Bivalvia)
fossil
Fossilized Shell Fragment / Mother of Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral
fossil
Dendritic Limestone
Calcite with Manganese Oxide (Manganese Dendrites)
sedimentary
Fossilized Coral
Scleractinian Anthozoa (Fossilized Calcium Carbonate, CaCO3)
sedimentary
Jasper containing fossilized inclusions
Silicon Dioxide (SiO2) with trace impurities and biogenic inclusions
sedimentary
Fossilized Wood / Petrified Wood
Petrified Wood (Silicified Flora)
fossil
Chert Nodules or Concretion
Cryptocrystalline Quartz (SiO2)
sedimentary
Coral Fossil (Hexagonaria)
Hexagonaria sp. (Silica-replaced)
fossil
Fossiliferous Limestone (with Crinoids)
CaCO3 (Calcium Carbonate)
sedimentary