Mineralized Fossil

Pyritized Ammonite

Ammonitida (replaced by Iron Disulfide, FeS2)

Siltstone with plant fossil impression

Sedimentary rock with Archaeopteris or Calamites flora impression

Fossil Coral

Phylum Cnidaria / Rugosa or Tabulata

Petrified Wood

Silicified Wood (SiO2)

Blue John Fluorite

Fluorite (Calcium Fluoride), CaF2

Shark Tooth Fossil

Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)

Mixed Mineral and Fossil Collection

Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)

Fossil Shell (Bivalve)

Class Bivalvia (fossilized)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Mosasaur Tooth Fossil

Mosasaurid vertebrate fossil (Hydroxyapatite)

Weathered vuggy quartz-rich rock (probable silicified limestone or quartz breccia)

Microcrystalline quartz (SiO₂) with calcite (CaCO₃), iron oxides, and minor clay minerals

Fossil Coral

Scleractinia (Fossilized Coral) / Calcium Carbonate (CaCO3) or Silica (SiO2)

Weathered iron-rich rock, likely laterite or ironstone

Ferruginous laterite/ironstone, composed mainly of goethite (FeO(OH)), hematite (Fe₂O₃), and clay minerals

Fossilized cylindrical shell or bone fragment

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

Ironstone Nodules / Siderite Concretion

Siderite (FeCO3) / Ferruginous Septarian Concretion

Fossilized Gastropod Internal Mold

Gastropoda (Steinkern fossil)

Fossiliferous Sandstone (with Quartz patch)

Sedimentary Sandstone with Silicified Shell Fragments

Fossil Coral

Fossilized Scleractinia or Tabulata (various genera/species)

Sandstone with Manganese Dendrites

Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)

Fossilized Bivalve Shell

Bivalvia (fossil specimen)

Fossilized Bone Fragment

Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)

Fossilized Shark Tooth

Carcharocles sp. (likely Lemon or Sand Tiger)

Turtle Stone / Septarian Nodule (Fragment)

Septarian Concretion (Calcite, Aragonite, and Limestone)

Fossilized Shark Tooth (fragment)

Elasmobranchii (Class) fossil

Shark Tooth Fossil

Carcharocles megalodon or similar fossilized shark tooth

Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)

Phylum Mollusca, Class Bivalvia

Fossilized Shark Tooth

Carcharodon (Galeocerdo sp. or Lamniform)

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

Fossil Coral (Rugose Coral / Horn Coral fragment)

Rugosa (Tetracoralla) / Calcite (CaCO3)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified wood (Quartz replacement, SiO2)

Tumbled Stone Collection (Fluorite, Sodalite, Moss Agate, Amethyst/Charoite, and Grey Agate)

Silica (SiO2) and Calcium Fluoride (CaF2) based minerals

Petrified Wood / Fossilized Wood

Silicified Wood (Silicon Dioxide - SiO2)

Fossilized Bone (Petrified Bone)

Permineralized Bone Fossil

Fossil Shark Tooth

Chondrichthyes (class)

Fossilized Crab Carapace (Concretion)

Decapoda (fossil), typically preserved in calcite or siderite concretion

Limonite-stained Quartz

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O) coatings

Quartz-bearing iron-stained breccia

Brecciated quartz/quartzite with iron oxides, chiefly SiO₂ with hematite/goethite and possible feldspar or host-rock fragments

Fossilized Shark Tooth

Lamniformes (order) fossil

Fossilized Brachiopod

Phylum Brachiopoda (replaced by Calcite/CaCO3)

Shark Tooth Fossil

Vertebrate fossilized tooth

Dinosaur Claw Fossil

Fossilized Theropod Claw (Vertebrate Palaeontological Specimen)