Fossil Shell
Phylum Mollusca (Gastropod fossil)
fossil
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
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Fossilized Stingray Mouth Plate
Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)
fossil
Chert Cobble with Crinoid Fossil
Silica (SiO2) with Crinoid ossicle
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Fossil Shell (Brachiopod or Mollusk)
Phylum Brachiopoda or Class Bivalvia (e.g., Mucrospirifer or similar genus)
fossil
Spinosaurus Tooth
Spinosaurus aegyptiacus (fossilized in Hydroxyapatite)
sedimentary
Fossil Shark Tooth
Carcharadon sp. (likely Carcharodon carcharias or similar Lamniformes)
fossil
Ammonite Fossil
Ammonoidea
fossil
Fossil Coral
Scleractinia (Fossilized Hexacoral)
fossil
Fossilized Coral
Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz / Chalcedony replacement)
fossil
Petrified Wood
Silicified Wood (mainly Quartz/Chalcedony, SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Cockle Shell Fossil
Cardiidae family (Bivalvia)
fossil
Cockle Shell Fossil
Cardium (Bivalvia)
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Crinoid Stem Fossil
Crinoid columnal (Echinodermata)
fossil
Fossilized Ripple Marks or Stromatolite
Sedimentary ripple mark imprint / Biosedimentary structure
fossil
Fossilized Coral (Rugose or Tabulate) or Stromatolite
Phylum Cnidaria / Stromatolithus
fossil
Crinoid Stem Fossil
Crinoid columnal (Echinodermata)
fossil
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Rugose Coral Fossil
Rugosa (Order) / Horn Coral
fossil
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
fossil
Fossilized Shark Tooth
Carcharocles sp. or similar Lamniformes
fossil
Crinoid Fossil in Limestone
Crinoidea (class) in Fossiliferous Limestone
fossil
Rugose Coral Fossil (Horn Coral)
Order Rugosa (common genera include Zaphrentis or Heliophyllum)
sedimentary
Gastropod Fossil (Snail Steinkern)
Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Bivalve Fossil (Internal Mold/Steinkern)
Class Bivalvia (Fossilized Mold)
sedimentary
Tumbled pegmatitic granite
Granite, chiefly quartz–feldspar–mica; likely altered pegmatite
igneous
Petrified Wood
Silicified Wood (SiO2)
fossil
Weathered chert or silicified limestone nodule
Microcrystalline quartz (SiO₂), possibly replacing limestone; exact identification requires testing
sedimentary
Dendritic Quartz Pebble
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Desert Rose (Baryte or Selenite variant)
Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions
mineral
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Crinoid Fossil Fragment
Crinoidea (echinoderm fossil embedded in limestone/matrix)
fossil
Silicified Gastropod Fossil (Agatized Fossil)
Gastropoda (Class) preserved in Chalcedony/Quartz (SiO2)
sedimentary
Slate
Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral