Fossilized Bone / Dinosaur Fossil
Fossilized vertebrate bone (permineralized)
fossil
Category
Organic Specimen (Fossil)
Browse organic specimen (fossil) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2)
fossil
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3 with organic inclusions)
fossil
Petrified Wood (Black / Carbonized)
Silicon Dioxide (Quartz/Chalcedony replacing Organic Matter)
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Petrified Wood
Silicified wood (Quartz pseudomorph after wood)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert Concretion
Microcrystalline Quartz (SiO2)
sedimentary
Shale
Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Fossilized Shark Tooth
Elasmobranchii (fossilized matrix/root section)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Fossiliferous limestone
Bioclastic limestone, composed mainly of calcite (CaCO₃)
sedimentary
Petrified Wood
Silicified wood (SiO2)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succiniferous fossil resin (C10H16O)
mineraloid
Limestone with Fossil
Sedimentary limestone, calcium carbonate (CaCO3)
sedimentary
Fossilized Bone (Petrified Bone)
Permineralized Vertebrate Remains
sedimentary
Fossil coral fragment
Likely calcitic colonial coral, possibly fossilized scleractinian coral
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock
sedimentary
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)
sedimentary
Polished fossilized ammonite or nautiloid shell
Ammonoidea or Nautiloidea; originally aragonitic shell, commonly replaced by calcite or chalcedony
fossil
Turritella Agate (Elimia Agate)
Silicified Elimia tenera (formerly misidentified as Turritella)
sedimentary (silicified fossiliferous chalcedony)
Amber
Succinite (C10H16O)
mineral
Fossilized Shark Tooth
Eocene Lamniformes (Mackerel Shark clade)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Dendritic Limestone
Calcite with Manganese Oxide (Manganese Dendrites)
sedimentary
Fossil Coral
Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)
fossil
Fossil Coral (Petoskey / Horn Coral Sliced Button)
Scleractinia / Rugosa (Silurian-Devonian Anthozoa)
fossil
Shark Tooth Fossil
Carcharhiniformes or Lamniformes (order level fossil)
fossil
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Crinoid Stem in Matrix
Crinoid (Class: Crinoidea)
fossil
Fossilized Wood (Petrified Wood) and Associated Rocks
Silicified Wood / Xylopal
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Biogenic Fossils
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone (Pink/Red)
Calcium Carbonate (CaCO3) with Bioclasts
sedimentary
Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary