Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Organic Specimen (Fossil)
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Petrified Wood
Silicified Wood (SiO2)
metamorphic
Coquina / Fossiliferous Limestone
Coquina (composed primarily of Calcium Carbonate / CaCO3)
sedimentary
Fossil Shark Tooth
Odontaspididae (likely Carcharias sp.)
fossil
Oyster Shell Fragment
Crassostrea virginica (or related Bivalvia)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Black Shale
Argillaceous Chert/Shale
sedimentary
Fossiliferous limestone, possibly coral or stromatoporoid fossil
Calcitic limestone; predominantly CaCO₃, with fossilized colonial-organism structures
fossil
Bivalve Fossil in Sedimentary Matrix
Fossiliferous Mudstone (Class: Bivalvia)
sedimentary
Fossil Coral
Tabulate Coral (potentially Favosites or Calapoecia)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of Cellulose)
fossil
Geode (unopened)
Chert / Chalcedony Geode (SiO2)
sedimentary
Amber
Succinite (Fossilized Resin)
mineral
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Amber
Succinates (Fossilized Tree Resin)
mineraloid
Conical fossil shell or shell fragment
Likely a gastropod shell fragment; exact taxon indeterminate from the image
fossil
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Amber (Burmite)
Fossilized tree resin (Succinite variant)
Organic mineraloid
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Shale (possibly Carbonaceous or Oil Shale)
Laminated Mudstone (primarily clay minerals and quartz)
sedimentary
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth (Eroded)
Carcharodon sp. or Otodus sp. fragment (likely)
fossil
Fossilized tooth, likely mammalian molar
Indeterminate Mammalia; mineralized dentine and enamel
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Brachiopod Fossil in Sedimentary Rock
Phylum Brachiopoda fossil imprint in sedimentary matrix
fossil
Fossil Coral (Favosites)
Favosites (Order: Tabulata, Phylum: Cnidaria)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Echinoid / Sea Urchin Internal Mold
Echinoidea internal cast (steinkern)
fossil
Shale
Clastic sedimentary rock (primarily clay and silt minerals)
sedimentary
Fossil Coral in Limestone
Scleractinia (Anthomastodon or similar) in Sedimentary Calcarenite
fossil
Sandstone with Bedding Planes
Arenite (Sedimentary rock composed primarily of sand-sized minerals)
sedimentary
Fossilized Shark Tooth (Basal Bone)
Otodus sp. (Mineralized Hydroxyapatite)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Amber
Succinite (Fossilized Tree Resin)
fossil
Coprolite
Fossilized Feces
sedimentary
Fossiliferous Limestone
Calcite-rich Fossiliferous Limestone (CaCO3)
sedimentary