Mineralized Fossil

Fossilized tooth, likely shark tooth

Fossil selachian tooth; possibly Otodus/Carcharocles or related shark, identification uncertain from image

Fossilized sea urchin

Echinoid test, likely a regular sea urchin; calcite (CaCO₃)

Petrified wood (likely agatized or silicified wood)

Silicified wood; primarily microcrystalline quartz (SiO₂), often with chalcedony and iron oxides

Polished fossil ammonite slice

Ammonoidea (commonly polished juvenile ammonite or nautiloid-like cephalopod fossil)

Polished fossil tooth or jaw fragment

Indeterminate vertebrate dental/bone fossil; likely mineralized enamel and dentine

Fossil shark tooth

Likely Otodus megalodon (species identification uncertain from image)

Fossilized Ray Barb (Stinger) Fragment

Myliobatiformes indet. (Fossil stingray spine)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, SiO2)

Fossilized bivalve in sandstone/conglomerate

Indeterminate fossil mollusk, likely Bivalvia, preserved in lithified siliciclastic sediment

Fossil bivalve shell

Likely a fossilized oyster or other marine bivalve; exact genus is indeterminate from the image

Fossil shell fragment

Indeterminate mollusk shell; likely gastropod or bivalve, composed mainly of calcium carbonate (aragonite/calcite)

Fossilized shell or coral fragment

Indeterminate fossil; possibly a gastropod/bivalve fragment or colonial coral

Likely fossilized shark tooth

Possibly *Carcharocles* or *Otodus* sp.; exact identification requires scale and detail

Fossil bivalve shell

Ribbed pectinid or related bivalve; originally calcite/aragonite (CaCO₃), likely partially mineralized

Ammonite fossil

Fossilized ammonoid cephalopod, commonly classified within Ammonoidea

Fossil Coral

Hexagonaria or Rugose coral fossil in limestone/silica matrix

Fossil coral fragment

Fossilized colonial coral, commonly *Hexagonaria* (often called Petoskey stone) or related scleractinian/tabulate coral

Fossilized shell fragment

Indeterminate fossil mollusk; likely a silicified or mineral-replaced bivalve/gastropod fragment

Fossilized shell fragment

Bioclastic carbonate, likely a bivalve or brachiopod shell preserved as calcite/aragonite

Fossil gastropod shell

Likely a fossil marine gastropod, possibly a turritellid or auger-like mollusk; exact species requires locality and diagnostic details

Fossilized bone

Petrified bone; commonly fossil vertebrate bone composed largely of hydroxyapatite and silica/calcite replacement minerals

Coral Skeleton / Fossil Coral

Scleractinia (Aragonite, CaCO3)

Polished fossil ammonite cross-section

Ammonoidea (extinct cephalopod; commonly Jurassic/Cretaceous ammonite)

Crinoid Stem Fossil

Crinoid Columnal (Phylum Echinodermata)

Fossilized coral (likely honeycomb or branching coral)

Fossil coral; probable Scleractinia or Tabulata, composition mainly microcrystalline CaCO₃

Fossil shell fragment, likely bivalve or gastropod

Fossilized calcium-carbonate shell; likely aragonite/calcite replaced by calcite

Fossil coral, likely solitary rugose coral

Rugosa (possibly colonial tabulate coral); calcite/aragonite replaced by calcite

Fossilized shell, likely brachiopod or bivalve

Indeterminate fossil shell; possible Spiriferida brachiopod or thick-shelled bivalve

Fossilized turtle shell or carapace fragment

Indeterminate Testudines; likely a fossil turtle carapace scute/bone

Fossilized shell or coral fragment

Indeterminate marine mollusk or colonial coral fossil; likely calcite/aragonite replaced by calcite (CaCO₃)

Polished fossilized wood (likely petrified wood)

Silicified wood; primarily quartz (SiO₂) replacing wood tissue

Fossilized bivalve shell or shell-rich limestone

Likely an indeterminate fossil mollusk; calcite/aragonite (CaCO₃), possibly preserved in limestone

Fossil shark tooth

Likely fossilized shark tooth, possibly *Carcharocles* or *Otodus* species

Fossilized tooth, likely shark tooth

Fossilized selachian tooth; possibly a worn Otodus or related shark tooth

Fossil oyster shell

Exogyra sp. or a related fossil oyster; largely calcitic shell (CaCO₃)

Favosites Fossil (Honeycomb Coral)

Favosites goldfussi / Order Tabulata

Beach-worn fossil bone or coral fragment

Indeterminate biogenic calcium-carbonate material; likely fossilized bone (hydroxyapatite) or coral (calcite/aragonite)

Likely fossil tooth or tooth fragment

Indeterminate fossilized vertebrate tooth; possibly shark or marine reptile, identification uncertain from the image

Fossil crinoid columnal in limestone

Crinoidea indet.; calcitic ossicle (CaCO₃)

Fossilized bone, likely a tooth or jaw fragment

Mineralized vertebrate bone; taxonomic identification requires clearer diagnostic anatomy

Fern fossil in shale

Plant fossil, likely a fern frond impression preserved in fine-grained shale; exact species indeterminable from the image

Fossilized bone or bone fragment

Indeterminate fossil bone; mineralized apatite (hydroxyapatite), commonly Ca₅(PO₄)₃(OH)