Organic Specimen (Fossil)

Fossilized Shark Tooth

Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))

Sandstone

Arenite (SiO2 predominantly)

Fossilized Shark Tooth

Elasmobranchii dentition (calcium phosphate / hydroxyapatite)

Limestone with Chert or Siltstone bands

Sedimentary carbonate rock (CaCO3) often with siliceous impurities

Sandstone (likely Fossiliferous Sandstone)

Clastic sedimentary rock (primarily SiO2)

Chert (Chert Nodule)

Silicon Dioxide (SiO2)

Polished fossiliferous agate

Chalcedony (microcrystalline SiO₂) containing fossil fragments, likely an agatized limestone or stromatolite

Coal (Anthracite or Bituminous)

Carbonaceous sedimentary rock (Carbon)

Fossil Coral

Rugosa or Tabulata / Hexacorallia (replaced with silica or calcite)

Fossil Coral (Favosites)

Favosites (Order: Tabulata, Phylum: Cnidaria)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Shale (possibly Carbonaceous or Oil Shale)

Laminated Mudstone (primarily clay minerals and quartz)

Fossiliferous Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Chert (Nodular or Fossiliferous)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Polished petrified wood

Silicified fossil wood, chiefly microcrystalline quartz (SiO₂)

Ironstone Concretion

Siderite or Goethite Concretion

Fossilized Shark Tooth

Chondrichthyes (Class) fossilized tooth

Limestone

Sedimentary rock composed mainly of calcite (CaCO3)

Petrified Wood

Silicified Wood (mainly Quartz / SiO2)

Fossilized Bone Fragment

Petrified Osseous Material

Gastropod Steinkern (Fossil Snail Internal Mold)

Class Gastropoda (Internal Mold)

Weathered limestone fragment

Calcitic limestone (mostly CaCO₃; possibly micritic limestone)

Limestone with Lichen

Calcium Carbonate (CaCO3) with Endolithic/Epilithic Lichen

Polished fossil coral

Agatized or silicified coral, commonly fossilized stony coral (Scleractinia); exact genus cannot be determined from the image

Fossiliferous limestone pebble

Bioclastic limestone, primarily calcite (CaCO₃)

Petrified Wood

Silicified Wood (primarily SiO2)

Bivalve Fossil in Sedimentary Matrix

Fossiliferous Mudstone (Class: Bivalvia)

Geode (unopened)

Chert / Chalcedony Geode (SiO2)

Amber

Succinite (Fossilized Tree Resin)

Amber

Succinited (fossilized tree resin)

Amber

Succinite / Fossilized Resin (C10H16O)

Chert (Siliceous Mudstone variant)

Microcrystalline quartz (SiO2)

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Enrolled Trilobite Fossil

Phylum Arthropoda, Class Trilobita (likely Calymene or Flexicalymene)

Petrified Wood

Silicified Wood (SiO2)

Fossilized Bone

Petrified Bone (Fluorapatite / Calcium Phosphate replacement)

Fossilized Shark Teeth

Otodus sp. (Eocene Sand Tiger/Mackerel Shark)

Limestone (Porous/Travertine variant)

Sedimentary Calcium Carbonate (CaCO3)

Coquina / Fossiliferous Limestone

Coquina (composed primarily of Calcium Carbonate / CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Amber

Succinite (Fossilized Resin)