Sedimentary (Silicified Fossiliferous Chalcedony)

Fossiliferous Limestone

Limestone (CaCO3) with Crinoid/Bivalve fossils

Fossiliferous Limestone

Calcite (CaCO3) Rich Bio-sedimentary Rock

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Biogenic Inclusions

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with fossil inclusions

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone

Carbonate Rock (CaCO3 with organic inclusions)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclastic Inclusions

Fossiliferous Shale

Carbonaceous Shale (with potential plant/aquatic fossils)

Fossiliferous limestone

Bioclastic calcarenite/calcirudite, chiefly calcium carbonate (CaCO₃)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Dinosaur Fossil Tooth

Vertebrate Fossilized Tooth

Polished leopard-skin jasper (orbicular jasper)

Silicified microcrystalline quartz/chalcedony, commonly with iron-oxide and manganese-oxide inclusions

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Rounded pale pebble, likely limestone or calcite-rich stone

Limestone (primarily calcite, CaCO₃), provisional identification

Fossiliferous limestone

Bioclastic limestone, chiefly calcite (CaCO₃), containing shell or coral fragments

Petrified Wood

Silicified Paleoxylon (SiO2)

Orbicular jasper (often sold as leopard-skin jasper)

Silicified volcanic tuff/rhyolite; chiefly microcrystalline quartz and chalcedony (SiO₂), with iron oxides and altered volcanic minerals

Dinosaur Bone (Gembone)

Agatized Dinosaur Bone (Silicified Paleo-osteoid)

Orbicular jasper (orbicular chert/jasper)

Silica-rich microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions

Petrified Rugose Coral (Horn Coral)

Order Rugosa (extinct coral)

Petrified wood (likely agatized or silicified wood)

Silicified wood; primarily microcrystalline quartz (SiO₂), often with chalcedony and iron oxides

Fossiliferous Sandstone / Fossil Fragment

Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material

Banded Mudstone (Siltstone Pebble)

Siltstone / Argillite (Fossiliferous Mudstone)

Coquina / Fossiliferous Limestone

Fossiliferous Limestone (Calcite, CaCO3)

Fossilized Gastropod in Limestone

Gastropoda (Class) in Fossiliferous Limestone

Fossilized Bivalve Shell (Fossilized Clam)

Bivalvia (class) / CaCO3 (Calcium Carbonate)

Fossiliferous Limestone

Sedimentary Limestone (CaCO3) containing Crinoid or Brachiopod remains

Petrified Wood

Silicified Wood (SiO2)

Likely polished/tumbled fossil shell or concretion

Indeterminate; possibly a fossil bivalve or gastropod in mineralized matrix

Fossiliferous Sandstone with Blastoid / Crinoid Fossil

Echinodermata (Crinoid stem or Blastoid species in Sandstone)

Crinoid Fossil in Limestone

Crinoidea (class) in Fossiliferous Limestone

Fossiliferous Rock (likely Dinosaur Fossil in Matrix)

Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)

Limestone

Calcareous sedimentary rock (CaCO3)

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Petrified Wood

Silicified Wood (SiO2)

Weathered limestone or calcareous tufa

Calcite-rich carbonate rock, primarily CaCO₃ (often micritic limestone or travertine/tufa)

Chert / Fossiliferous Limestone

Sedimentary Chert (often containing CaCO3 or SiO2 replacements)

Quartz-veined ironstone/jasper

Silicified ferruginous rock; predominantly microcrystalline quartz (SiO₂) with iron oxides/hydroxides, likely goethite and hematite