Mineral (Silicate Replaced Organic Material)

Fossil Shark Tooth Fragment

Elasmobranchii dentition (fragment)

Fossil Shark Tooth

Elasmobranchii tooth fossil (e.g., Otodus / Carcharocles)

Fossilized Coral

Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)

Graphite-rich schist (likely graphite ore)

Graphite-bearing schist; predominantly graphitic carbon (C) with mica, quartz, and possible feldspar

Fossil Seashell

Invertebrate fossil (Bivalvia)

Fossilized Shark Tooth (Otodus)

Otodus sp. (calcium phosphate/hydroxylellite)

Fossilized bivalve shell in limestone

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

Chert / Flint

Chert (varieties include Flint)

Red Jasper (beads)

SiO₂ (Silicon Dioxide)

Brecciated jasper

Chalcedony–quartz aggregate, predominantly SiO₂, with iron-oxide coloring

Fossilized Coral

Scleractinian Anthozoa (Fossilized Calcium Carbonate, CaCO3)

Tumbled Ocean Jasper (likely orbicular jasper)

Microcrystalline quartz (SiO₂), chiefly chalcedony with iron oxides and other inclusions

Sandstone

Arenite

Fossilized Gastropod Shell

Class Gastropoda (Fossil)

Granite (likely weathered quartz-bearing granite)

Granite; primarily quartz, feldspar, and mica/amphibole

Jasper

Silicon Dioxide (SiO2) with impurities

Fossilized Shark Tooth

Elasmobranchii fossil (likely Odontaspididae family)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Fossilized Shark Tooth (Fragment)

Elasmobranchii gen. et sp. indet.

Nacre (Mother of Pearl)

Nacre (Biogenic Aragonite/Calcite composite, CaCO3)

Small gray rock fragment

Indeterminate; possibly quartz-rich granite, chert, or concrete-like silicate material

Fossil Coral

Scleractinia (Fossilized Hexacoral)

Tumbled tiger’s eye

Quartz variety, mainly SiO₂ with fibrous crocidolite pseudomorphs

Sandstone

Arenite (SiO2 composed primarily of quartz)

Black-and-white jasper

Jasper, microcrystalline quartz (SiO₂), with contrasting white mineral inclusions

Petrified wood

Silicified wood; commonly quartz (SiO₂) replacing wood tissue

Petrified Wood

Silicified Wood (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Bauxite

Aluminium ore / Hydrated aluminium oxides (AlOx(OH)3-2x)

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Chondrite Meteorite Fragment

Ordinary Chondrite (L or H type)

Sandstone

Sandstone (Siliciclastic Sedimentary Rock)

Petrified Wood

Silicon Dioxide (SiO2)

Polished ammonite fossil

Ammonoidea (likely a Jurassic or Cretaceous ammonite), preserved in limestone/mudstone

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Fossilized cylindrical shell or bone fragment

Indeterminate biogenic carbonate or phosphatic fossil; possible fragment of a tubular shell (e.g., scaphopod) or hollow bone

Biotite Schist

Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]

Fossilized Coral (Petoskey Stone or Tabulate Coral)

Scleractinia or Tabulata (CaCO3 - Calcium Carbonate)

Petrified Palmwood

Palmoxylon (fossilized monocot xylem)

Polished petrified wood

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

Polished Ocean Jasper (orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron oxides and other inclusions

Fossilized Nut / Coprolite / Concretion

Trace Fossil / Permineralized Plant Material