Organic Specimen (Fossil)

Petrified Wood

Silicified Wood (mainly Quartz/Chalcedony, SiO2)

Shark Tooth Fossil

Carcharocles megalodon or similar fossilized shark tooth

Shark Tooth Fossil

Vertebrate fossilized tooth (Chondrichthyes)

Fossil Coral

Rugose or Tabulate Coral Fossil (CaCO3 replacement)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Fossilized Coral

Hexagonaria (Rugose coral) / Calcium Carbonate (CaCO3)

Fossilized Shell in Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossilized Tooth Fragment

Vertebrate Fossil (Mammalia indet.)

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone

Calcium carbonate (CaCO3) matrix with fossil inclusions

Limestone Pebble

Sedimentary carbonate rock (CaCO3)

Sandstone with Trace Fossils

Quartz Arenite with Bioturbation (Trace Fossils)

Ironstone Concretion (Limonite/Goethite)

Goethite/Limonite concretion (FeO(OH)·nH2O)

Fossiliferous Limestone (with Crinoids/Coral)

Fossiliferous Limestone (CaCO3)

Petrified Wood

Silicified Wood (SiO2)

Fossil Shark Tooth

Carcharodon sp. (likely Otodus or similar Lamniformes order)

Sandstone Concretion

Limonitic Sandstone Concretion

Fossil Shark Tooth

Chondrichthyes (class)

Fossilized Crab Carapace (Concretion)

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

Fossilized Vertebra

Chordata fossil (Vertebra)

Fossiliferous Limestone

Biogenic Limestone (CaCO3 with fossil fragments)

Fossilized Bone

Petrified Bone / Biogenic Sedimentary

Petrified Wood

Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)

Fossil Assortment and Geological Specimens

Various (including Ammonoidea)

Limpets Shell / Fossil Specimen

Patellogastropoda (Class)

Fossilized Echinoid (Sea Urchin)

Echinoidea (Fossil)

Fossiliferous Limestone

Biogenic Sedimentary Rock (primarily CaCO3)

Fossiliferous Limestone Pebble

Calcite-rich Fossiliferous Marine Limestone

Petrified Wood

Siliconized Wood (SiO2)

Fossiliferous Chert or Agate

Microcrystalline quartz (SiO2) with fossiliferous inclusions

Fossilized Bone Fragment

Petrified Osseous Material

Petrified Wood

Silicified Wood (primarily Quartz/SiO2)

Fossilized Shell

Invertebrate fossil (Bivalvia or Brachiopoda)

Fossil Shark Tooth

Chondrichthyes tooth fossil

Weathered limestone fragment

Calcitic limestone (mostly CaCO₃; possibly micritic limestone)

Orthoceras Fossil in Limestone

Orthoceras (extinct genus of cephalopods) in Carboniferous or Devonian Limestone

Coral Skeleton (Scleractinia)

Aragonite (CaCO3) biomineralisation within Anthozoa

Coral Fossil (Scleractinia)

Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)

Seashell Fragment

Calcium carbonate (CaCO3) - primarily Aragonite or Calcite

Fossilized Bone

Permineralized Vertebrate Fossil

Fossiliferous Limestone

CaCO3 (with biological inclusions)