Fossiliferous limestone with colonial coral fossils
Calcitic limestone; probable fossil tabulate or rugose coral (Class Anthozoa)
fossil
Category
Organic Specimen (Fossil)
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Likely tumbled or polished fossil shell
Fossilized mollusk shell; exact species cannot be determined from this image
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Coal
Bituminous Coal / Anthracite
sedimentary
Petrified Wood
Silicified wood / Xylopal
fossil
Fossil Coral (Petoskey / Horn Coral Sliced Button)
Scleractinia / Rugosa (Silurian-Devonian Anthozoa)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 composed primarily of quartz)
sedimentary
Fossilized bone or tooth fragment in rock matrix
Indeterminate vertebrate fossil; mineralized apatite (carbonate-fluorapatite) with silica/carbonate-rich matrix
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Ironstone Concretion
Ironstone (Limonite/Goethite Concretion)
sedimentary
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia (typically composed of Calcium Carbonate / CaCO3)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Silty Shale or Mudstone
Siltstone/Mudstone (Clastic Sedimentary Rock)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Dendritic Agate
Chalcedony (SiO2) with manganese/iron oxide inclusions
mineral
Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
sedimentary
Amber
Fossilized tree resin
gemstone
Fossiliferous limestone
Calcitic limestone, primarily calcium carbonate (CaCO₃), with visible shell or coral fossils
sedimentary
Amber
Succinited (C10H16O)
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Tumbled fossiliferous limestone
Bioclastic limestone, primarily calcite (CaCO₃)
sedimentary
Petrified Wood / Red Jasper
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Grey Limestone
Calcium Carbonate (CaCO3)
sedimentary
Ferruginous Sandstone with Concretion
Sandstone (SiO2 dominated with Fe2O3 cement)
sedimentary
Fossiliferous Limestone
Carbonate Sedimentary Rock (primarily CaCO3)
sedimentary
Stromatolite (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Coprolite
Fossilized Feces
fossil
Mammoth Tooth
Mammuthus tooth
fossil
Polished chalcedony (likely moss/ag ate)
Microcrystalline quartz, SiO₂; probable moss agate or jasper variety
mineral
Amber
Succinite
Organic Mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossiliferous Limestone / Fossil Fragment
Calcium Carbonate Matrix with Biogenic Inclusions (CaCO3)
fossil
Fossilized Shark Tooth
Scapanorhynchus (Sand Tiger Shark relative)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Polished fossiliferous limestone, possibly ammonite-bearing
Calcite-rich limestone (CaCO₃), with visible fossil or shell fragments
fossil
Amber (Green variation)
Succinite
fossil
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Fossil Shell (Bivalve)
Class Bivalvia (Likely a member of the Ostreidae or Gryphaeidae family), CaCO3
sedimentary
Fossil-bearing limestone slab
Bioclastic limestone, likely containing brachiopod or bivalve impressions
fossil