Mineralized Fossil

Fossil shark teeth

Probably fossilized shark teeth, possibly *Otodus* or *Carcharhinus* species

Fossil Coral

Hexagonaria or Rugose coral fossil in limestone/silica matrix

Crinoid Stem Fossil

Crinoidea (Class) / Calcite (CaCO3)

Fossilized Shark Tooth (Megalodon or Carcharocles fragment)

Elasmobranchii (Fossilized tooth root / crown section)

Possible fossilized ammonite or concretion

Indeterminate fossil specimen; possibly an ammonoid mold/cast in iron-rich sedimentary rock

Fossilized Horse Tooth

Equus sp. (fossilized molar)

Fossiliferous Rock (likely Dinosaur Fossil in Matrix)

Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)

Fossilized wood fragment

Petrified wood; commonly silicified fossil wood (SiO₂ replacing organic tissue)

Fossilized Horn Coral

Rugosa (Rugose Coral)

Echinoidea (Fossil Sea Urchin)

Echinodermata Echinoidea

Tiger Shark Fossil Tooth

Galeocerdo cuvier (fossilized)

Polished petrified wood

Silicified wood, primarily microcrystalline quartz (SiO₂) replacing organic tissue

Tooth or shell fragment (likely fossilized marine material)

Indeterminate; possibly a fossil fish tooth or mollusk shell fragment composed mainly of calcium carbonate (CaCO₃)

Red Sandstone (Iron-stained)

Clastic sedimentary rock (primarily Quartz with Iron Oxides)

Ammonite Fossil

Ammonoidea

Crinozoan fossil (Crinoid stem fragment)

Crinoid (Class Crinoidea)

Fossilized Horn Coral

Rugosa (Order)

Polished fossilized wood (likely petrified wood)

Silicified wood; commonly quartz (SiO₂) replacing wood tissue

Mammoth Tooth

Mammuthus primigenius (Tooth fragment)

Fossilized Horn Coral

Rugosa (Tetracoralla)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified wood (primarily SiO2)

Fossilized oyster shell

Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite

Polished fossil shell, likely orthocone nautiloid

Orthoceras-type fossil; fossilized cephalopod shell, commonly marketed as Orthoceras

Ammonite Fossil (Polished Section)

Ammonoidea (typically mineralized with Calcite CaCO3)

Fossilized Shark Tooth

Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)

Orthoceras Fossil in Limestone

Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone

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))

Brachiopod Fossil (Spiriferid)

Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)

Fossilized Sand Tiger Shark Tooth

Carcharias taurus / Striatolamia macrota (mineralized as Hydroxylapatite/Francolite)

Fossil bivalve shell

Likely an internal mold or mineralized shell of a brachiopod or small bivalve; exact taxonomy requires locality and diagnostic details

Shale

Laminated Mudstone

Quartz Vein in Basalt or Mafic Rock

Silicon Dioxide (SiO2) vein in volcanic/mafic matrix

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

Gossan (Iron Hat)

Goethite-Hematite rich weathered rock (Fe-hydroxides)

Limonite (Iron Ore/Bog Iron)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Quartz Vein in Basalt or Sedimentary Host Rock

Silica-veined lithic fragment (SiO2 in host matrix)

Crinoid Stem Fossil in Matrix

Phylum Echinodermata, Class Crinoidea

Fossilized Coral (Petrified Coral)

Anthozoa (Scleractinia)