Organic Specimen (Fossil)

Fossiliferous Limestone (Crinoidal Limestone)

Bioclastic grainstone (CaCO3)

Dinosaur Claw (Dromaeosaurid)

Dromaeosaurid ungual (potential Deinonychus or Velociraptorine)

Chert (Gravel pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Chert (SiO2)

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Fossiliferous Limestone

Calcium carbonate (CaCO3) with marine fossils

Chert Nodules (Jasper)

Microcrystalline Quartz (SiO2)

Limestone

Calcareous sedimentary rock (primarily CaCO3)

Shark Tooth Fossil

Selachii fossil

Brachiopod Fossil

Phylum Brachiopoda (order potentially Spiriferida)

Banded Chert (Ironstone/Jasper)

Cryptocrystalline Quartz (SiO2) with Iron Oxides

Siderite Concretion

Ironstone (Siderite) Concretion, FeCO3

Fossilized Oyster Shell

Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)

Sand Dollar Fossil

Echinoidea (Clypeasteroida)

Ammonite Fossil

Ammonoidea

Mosasaur Tooth Fossil

Mosasauridae (likely Prognathodon or Plioplatecarpus)

Chert (Brown Chert / Flint)

Silicon Dioxide (SiO2)

Picasso Jasper (or Picasso Marble)

Metamorphosed Limestone (Calcium Carbonate, CaCO3, with impurities)

Chert (Nodule)

Silicon Dioxide (SiO2)

Limestone Cobble

Sedimentary Limestone (CaCO3)

Coral Fossil

Anthozoa (order Scleractinia)

Agate with Fossil/Inclusion

Silicon Dioxide (SiO2) with chalcedony and potential fossil inclusion

Fossil Sea Urchin / Echinoid

Class Echinoidea

Fossilized Gastropod Steinkern

Class Gastropoda internal mold

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with fossil inclusions

Agatized Chert / Chalcedony

Silicon Dioxide (SiO2)

Septarian Nodule (Dragon Stone)

Septarian Nodule (Calcium Carbonate/Aragonite/Calcite Concretion)

Septarian Nodule

Septarian Concretion (CaCO3 with Siderite/Calcite/Aragonite)

Claystone Concretion

Septarian Concretion (Ironstone-rich)

Limestone

Calcium Carbonate (CaCO3)

Shale

Shale (clastic sedimentary rock)

Turritella Agate

Silicified Elimia tenera Fossil (SiO2)

Sandstone with Quartz Vein

Quartz-cemented quartz arenite

Fossilized Shark Tooth

Elasmobranchii (tooth fossil, composed mainly of Bioapatite / Calcium Phosphate)

Fossil Sponge / Horn Coral / Crinoid Stem

Phylum Porifera or Cnidaria fossilized in calcium carbonate / silica

Brachiopod Fossil

Rhynchonellida (Order)

Fossil Seashell

Invertebrate fossil (Bivalvia)

Fossil Coral

Hexagonaria or Rugose coral fossil in limestone/silica matrix

Ammonite Fossil

Ammonoidea (typically preserved as Calcite CaCO3 or Pyrite FeS2)

Blue Agate (Tumbled and Dyed)

Silicon Dioxide (SiO2) with likely organic dyes

Chert (Jasper-bearing)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Chert (and Jasper variety)

Microcrystalline Quartz (SiO2)