Mineralized Fossil

Fossiliferous Limestone

Calcite-rich sedimentary rock with invertebrate fossils (CaCO3)

Fossilized Brachiopod in Limestone

Phylum Brachiopoda embedded in sedimentary limestone

Petrified Wood

Silicified Wood (SiO2)

Gastropod Fossil (Snail Internal Cast)

Class Gastropoda (Steinkern)

Brachiopod Fossil

Phylum Brachiopoda

Petrified Wood

Silicified wood (SiO2)

Ironstone Concretion

Ironstone (Limonite/Goethite/Hematite mixture)

Chert with Crinoid Fossil Impression

Microcrystalline Quartz (SiO2) with Crinoidea fossil impression

Sandstone

Sandstone (SiO2 with iron oxides and clay)

Common Pebble / Sedimentary Rock Fragment

Lithified clastic sediment

Worn River Pebble with Fossil Indentation

Sedimentary Rock with Fossil Infill

Petrified Coral (Agatized Coral)

Anthozoa (Agatized Fossil)

Sandstone with Dendritic Inclusions

Quartzose Sandstone

Fossil Shark Tooth

Phylum Chordata, Class Chondrichthyes (Possibly Cretalamna or Otodus)

Fossiliferous Limestone with Crinoid stems

Calcite-rich Biogenic Sedimentary Rock (CaCO3)

Fossilized Shark Tooth (Sand Tiger)

Carcharias sp. (Fossilized Tooth)

River Pebble (Graywacke/Sandstone)

Lithic Sandstone

Vesicular quartz-rich rock, possibly weathered rhyolite or silicified volcanic breccia

Silica-rich volcanic rock; likely microcrystalline quartz (SiO₂) with altered feldspar and iron-oxide staining

Fossil Coral / Fossilized Coral

Scleractinia (Anthodiscus / Favia / Montastraea fossil)

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz grains)

Sandstone (likely Arkose or Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

Fossiliferous limestone

Bioclastic limestone, composed mainly of calcite (CaCO₃)

Sandstone

Arenite (SiO2 predominantly)

Polished Mexican “Crazy Lace” agate tower

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions

Petrified Wood and Mixed Rocks

Silicified Wood (SiO2)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Limestone Pebble with Crinoid Fossil

Calcium Carbonate (CaCO3) - Fossiliferous Limestone

Fossil Coral

Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)

Tumbled agate (probable moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron/manganese dendritic inclusions

Limestone

Limestone (Calcium Carbonate, CaCO3)

Devil's Toenail

Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)

Sandstone and Mixed Rock Assemblage

Clastic Sedimentary Rock / Quartz Arenite

Fossilized Shark Tooth

Chondrichthyes tooth

Sandstone (Red)

Arenite (composed primarily of SiO2)

Crinoid Stem Fossil (in matrix)

Crinoid (Class Crinoidea)

Sandstone (Pebble)

Arenite (SiO2 based)

Fossilized Shark Tooth

Carcharhinus sp. (likely Bull or Requiem shark family)

Fossiliferous Chert or Limestone

Sedimentary rock containing fossilized marine invertebrates (likely crinoid stems or bryozoans)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)