Mineralized Fossil

Fossil Seashell

Invertebrate fossil (Bivalvia)

Fossilized Tooth

Vertebrate Fossilized Tooth (Mineralized Biogenic Material)

Bivalve Fossil (Brachiopod or Scallop)

Class Bivalvia (or potentially Phylum Brachiopoda)

Fossilized tooth fragment

Likely a mammalian molar or tooth fragment; exact animal cannot be determined from the image

Fossilized shell fragment

Likely a fossil mollusk shell; exact taxon cannot be determined from the image

Large bivalve shell fossil (possibly a clam)

Fossilized bivalve; exact taxon cannot be determined from the image

Mammoth or Mastodon Tooth Fragment

Mammuthus / Mammut molar fragment

Fossilized Brachiopod

Phylum Brachiopoda

Fossilized shell or coral fragment

Indeterminate biogenic carbonate; likely calcite/aragonite (CaCO₃)

Fossiliferous shale or mudstone with plant fossils

Carbonaceous mudstone/shale containing fossilized foliage, likely fern or seed-fern impressions

Fossilized Shark Tooth

Chondrichthyes (Class)

Fossil Shark Tooth

Squalicorax (likely Squalicorax pristodontus or Squalicorax falcatus)

Fossil brachiopod shell

Likely a spiriferid or orthid brachiopod; shell composed mainly of calcium carbonate (calcite)

Fossilized bone, likely a large vertebrate limb or rib fragment

Petrified bone; exact taxon indeterminate from the image

Echinoid Fossil (Sea Urchin Fossil)

Echinoidea

Fossiliferous pebble, possibly a crinoid or shell fragment

Indeterminate bioclast in a dark sedimentary matrix; likely carbonate fossil material (calcite, CaCO₃)

Fossilized Bone

Fossilized Vertebrate Bone (Per mineralized)

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

Likely fossilized coral with polished blue calcite or aragonite specimen

Fossil coral, commonly Scleractinia; blue material likely dyed or treated calcite/aragonite

Megalodon Shark Tooth

Otodus megalodon

Ammonite fossil

Ammonoidea; likely a polished small ammonite, possibly Cleoniceras

Fossil brachiopod shell

Brachiopoda; exact genus and species cannot be determined from the image

Fossil shark tooth

Likely a fossilized shark tooth, possibly *Carcharodon* or *Carcharhinus*; exact species requires provenance and close examination

Ammonite fossil

Fossilized ammonoid cephalopod; likely an ammonite such as *Ammolytoceras* or a related Jurassic–Cretaceous genus

Fossilized gastropod (snail)

Gastropoda; shell commonly preserved as calcite (CaCO₃)

Fossil Coral

Rugose Coral or Tabulate Coral (Phylum Cnidaria)

Fossil Sand Dollar (Echinoidea)

Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)

Mammoth or Mastodon Tooth Fossil

Proboscidea tooth (Mammuthus or Mammut)

Fossilized Shark Tooth

Chondrichthyes (class)

Likely vertebra fossil or bone fragment

Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)

Fossil gastropod in granite-like stone

Gastropoda indet.; enclosing rock likely polished granite or gneiss

Fossilized tooth or tooth fragment

Indeterminate vertebrate tooth; likely mammalian, mineralized hydroxyapatite

Likely petrified wood

Silicified fossil wood, chiefly quartz (SiO₂)

Coral fossil (likely fossilized colonial coral)

Calcareous fossil coral; commonly *Scleractinia* or *Tabulate/ rugose coral* (identification requires close pore-pattern examination)

Ammonite fossil

Ammonoidea (likely an involute ammonite; exact genus requires preparation and context)

Ammonite fossil

Ammonoidea (coiled cephalopod fossil; exact genus indeterminate)

Fossil Shark Tooth

Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)

Fossil fish impression or partial fish fossil

Indeterminate fossilized fish; likely compressed vertebrate remains in sedimentary rock

Polished fossil shell fragment (likely ammonite or bivalve)

Fossilized mollusk shell; likely aragonite/calcite replaced by silica or iron-rich minerals

Fossilized bivalve shell

Paleozoic–Mesozoic bivalve fossil; commonly classified as Bivalvia indet.

Fossilized Blastoid (Sea Bud)

Pentremites sp. (Echinodermata, Blastoidea)

Fossilized bone fragment, possibly vertebra

Fossil bone (mineralized hydroxyapatite; exact taxon indeterminate)