Mineralized Fossil

Fossil fish impression/cast (likely small ray-finned fish)

Unidentified Actinopterygii; possibly a fish fossil in laminated shale

Fossilized marine shell fragment

Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)

Petrified Tabulate Coral

Favosites (Honeycomb Coral)

Fossil gastropod shell

Spiral marine gastropod fossil; likely a small ammonite-like or gastropod shell, exact taxon indeterminate

Fossilized gastropod shell

Calcitic or aragonitic gastropod fossil; likely Mollusca, Gastropoda

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineralized Apatite / Bio-apatite)

Fossil coral fragment (probable)

Recrystallized fossil coral, commonly scleractinian or tabulate coral; exact identification requires magnification and locality

Fossilized Coral

Rugose Coral / Hexagonaria (Fossilized calcium carbonate)

Fossil ammonite

Ammonoidea; likely a chambered ammonite mold/cast

Weathered fossil shell or crinoid fragment

Likely fossilized echinoderm or bivalve fragment; exact taxon indeterminate from the image

Crinoid Stem Fossil

Crinoid columnal (Class Crinoidea)

Fossilized tooth or tooth fragment

Indeterminate vertebrate tooth; possibly a fossil shark tooth (Carcharodon/Carcharocles)

Fossilized shell or brachiopod

Likely a calcareous brachiopod or bivalve fossil; exact identification requires clearer detail and scale

Fossilized bivalve shell in limestone

Calcitic fossil shell; likely an oyster or other rudist/bivalve (Bivalvia), preserved in carbonate rock

Fossil shark tooth, likely sand tiger shark

Fossilized selachian tooth; possibly *Carcharias* or *Striatolamia*

Fossil ammonite

Ammonoidea (likely a ribbed, involute ammonite; exact genus requires locality and preservation details)

Fossilized gastropod shell

Fossil Mollusca, class Gastropoda; likely a mineral-replaced or partially silicified shell

Rugose Coral Fossil

Order Rugosa

Fossil shell fragment, likely brachiopod or bivalve

Indeterminate bioclast; possible Brachiopoda or Mollusca

Polished fossil tooth, likely shark tooth

Fossilized selachian tooth; possibly Otodus or a related lamniform shark

Fossilized Shark Tooth (Carcharocles/Otodus or Sand Tiger Shark Tooth)

Elasmobranchii (Fossilized Tooth)

Fossil coral limestone

Fossilized colonial coral, commonly tabulate or rugose coral, preserved in calcite (CaCO₃)

Petrified wood (possible fossilized wood fragment)

Silicified fossil wood; commonly quartz or chalcedony replacing wood

Fossil tooth, possibly a shark tooth

Unidentified fossilized vertebrate tooth; species cannot be determined from the image

Fossilized bone or tooth fragment

Indeterminate fossil bone; possibly mammalian or reptilian

Fossilized bone or tooth fragment (indeterminate vertebrate fossil)

Mineralized vertebrate skeletal material; commonly apatite, Ca₅(PO₄)₃(F,Cl,OH), partly replaced by silica or calcite

Likely weathered fossil shell or fossiliferous limestone

Indeterminate molluscan fossil, possibly a bivalve or brachiopod preserved in carbonate rock

Petrified Wood

Silicified Wood (SiO2)

Tumbled fossil coral (often sold as “petoskey stone” or fossil coral)

Fossilized colonial coral; commonly Hexagonaria percarinata in true Petoskey stones, though this specimen’s pattern may represent another fossil coral

Fossilized ammonite

Ammonoidea (likely a ribbed Jurassic–Cretaceous ammonite), replaced mainly by calcite or silica

Fossil ammonite

Ammonoidea; likely a chambered ammonite mold/cast

Fossilized wood (petrified wood)

Silicified wood; commonly quartz or chalcedony replacing wood tissue

Tumbled fossil coral

Fossilized colonial coral, commonly Favositidae or related tabulate coral

Fossilized tooth fragment, likely mammalian

Mineralized dentine and enamel; exact taxon indeterminate from the photograph

Fossilized Shark Tooth (Root Portion)

Selachimorpha (partial specimen)

Fossilized Shark Tooth (Fragment)

Elasmobranchii gen. et sp. indet.

Polished fossil tooth, likely shark tooth

Likely fossilized shark tooth; exact taxon cannot be determined from this image

Fossilized oyster or other bivalve shell

Calcitic bioclast, commonly Ostrea spp. or Exogyra spp.

Coral limestone / fossil coral

Calcitic fossil coral, commonly Scleractinia; CaCO₃

Fossil scallop shell

Bivalve mollusk shell, likely family Pectinidae; primarily calcite (CaCO₃)

Mosasaur Tooth Fossil

Mosasauridae (likely Prognathodon or Mosasaurus)

Orthoceras fossil in limestone

Orthoceras regulare (extinct nautiloid cephalopod)