Fossilized Horn Coral
Rugosa (Rugose coral)
fossil
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
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Fossil Coral (Tabulate Coral Fragment)
Anthopleura / Tabulata (CaCO3 - Calcium Carbonate)
fossil
Crinoid Stem Fossil
Crinoid columnal (Echinodermata)
fossil
Fossilized Gastropod Shell
Class Gastropoda (Fossil)
sedimentary
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Mammoth Tooth
Mammuthus tooth fossil
fossil
Fossilized Shark Tooth (Dermal Denticle or worn tooth fragment)
Elasmobranchii (fossil remains)
sedimentary
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Limonite pseudo-concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
sedimentary
Sandstone
Arenite
sedimentary
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Fossil Coral / Crinoid Stem section
Anthozoa / Crinoidea fossil
fossil
Fossiliferous limestone (likely ammonite/gastropod-bearing)
Bioclastic limestone; predominantly calcite (CaCO₃)
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite / Goethite, FeO(OH)·nH2O)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Sedimentary Rock Fragments
Clastic Sedimentary Rock
sedimentary
Shark Tooth Fossil
Elasmobranchii fossil (likely Carcharias or Odontaspis sp.)
fossil
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Petrified Wood
Silicified wood (primarily quartz replacing organic cellulose)
fossil
Petrified Coral (Agatized Coral)
Fossilized Anthozoa (Silicon Dioxide replacement - SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Fossilized Shark Tooth
Chondrichthyes (Class) - likely Carcharodon or Otodus genus
fossil
Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)
Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)
fossil
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Fossil Coral
Rugose Coral / Hexagonaria (CaCO3)
fossil
Turritella Fossil
Turritella (Class Gastropoda, Family Turritellidae)
fossil
Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
sedimentary
Fossiliferous Limestone
Bioclastic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Bone Fragment
Vertebrate Fossil Material (Apatite/Calcium Phosphate)
fossil
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Sandstone with Trace Fossils
Quartz Arenite with Bioturbation (Trace Fossils)
sedimentary
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Brown Quartz (Jasper or Chert)
Silicon Dioxide (SiO2)
sedimentary
Sand Tiger Shark Tooth
Carcharias taurus
fossil