Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
Category
Browse mineralized fossil specimens identified by the Rock Identifier community.
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
Fossil Rugose Coral (Horn Coral)
Order Rugosa (likely Grewingkia or Heliophyllum species); Calcium Carbonate (CaCO3)
Earth
Terra / Earth
Fossilized Chiton (Polyplacophora)
Polyplacophora (fossilized valves)
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcedony replacement)
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Petrified Wood
Silicified Wood (SiO2)
Petrified Wood
Silicified Wood (SiO2 - primarily Quartz/Chalcedony/Opal)
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
Devil's Toenail (Fossil Oyster)
Gryphaea arcuata (Calcium Carbonate, CaCO3)
Orthoceratid Fossil in Limestone
Orthoceras (extinct genus of Nautiloid Cephalopod)
Fossilized Echinoid (Sea Urchin)
Echinoidea (Class)
Fossil Coral
Cnidaria fossil (often Calcium Carbonate / CaCO3)
Spinosaurid Dinosaur Tooth
Spinosaurus aegyptiacus (fossilized)
Fossil Sand Dollar (Echinoidea)
Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)
Fossilized Shark Tooth in Matrix
Otodus sp. (likely Otodus obliquus)
Megalodon Shark Tooth Fossil
Otodus megalodon
Fossilized Shark Tooth (Basal Bone)
Otodus sp. (Mineralized Hydroxyapatite)
Crinoid Stem Fossil
Crinoid columnal (Class Crinoidea)
Ammonite Fossil
Ammonoidea (subclass)
Fossilized Crinoid Stem Segment
Crinoid (Phylum Echinodermata, Class Crinoidea)
Spinosaurus fossil (permineralized bone)
Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)
Fossiliferous Rock (likely Dinosaur Fossil in Matrix)
Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
Echinoidea (Fossil Sea Urchin)
Echinodermata Echinoidea
Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
Petrified Wood
Silicified Wood (SiO2)
Petrified Wood
Silicified wood (primarily SiO2)
Fossilized Shark Tooth
Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)
Ammonite Fossil (Polished Section)
Ammonoidea (typically mineralized with Calcite CaCO3)
Gastropod Fossil (Snail Stone or Steinkern)
Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)
Fossil Shark Tooth (Otodus obliquus)
Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))
Orthoceras Fossil in Limestone
Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone
Fossilized Sand Tiger Shark Tooth
Carcharias taurus / Striatolamia macrota (mineralized as Hydroxylapatite/Francolite)
Brachiopod Fossil (Spiriferid)
Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)
Shale
Laminated Mudstone
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
Fossilized Shark Tooth
Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron
Red Jasper
Jasper (Silicon Dioxide) - SiO2
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)