Petrified Wood
Silicified wood (SiO2)
fossil
Category
Organic (Biological Organism)
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Amber
Succinite
mineral
Amber
Succinite
Mineraloid
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Fossil Shell (Bivalve)
Class Bivalvia (Likely a member of the Ostreidae or Gryphaeidae family), CaCO3
sedimentary
Fossiliferous Limestone (Shell Fragment)
Biogenic Limestone (Calcium Carbonate / CaCO3)
sedimentary
Small seashell fossil or shell fragment
Likely calcium-carbonate shell material, chiefly aragonite or calcite; exact species indeterminate
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Black Limestone with Calcite Veining
Bituminous Limestone (CaCO3 with Organic Carbon inclusions)
sedimentary
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Amber (Green variation)
Succinite
fossil
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
mineral and glass
Red Coral
Corallium rubrum
mineral
Shale (or Slate / Coal / Jet)
Laminated fine-grained sedimentary rock (predominantly clay minerals)
sedimentary
Sandy Ironstone
Ferruginous Sandstone
sedimentary
Petrified Wood
Silicified Wood (Permineralized organic tissue)
fossil
Fossiliferous Limestone with Fossil Fragment
Fossiliferous Limestone (CaCO3 with organic remains)
fossil
Amber
Succinite (organic gemstone, approx. C10H16O)
fossil
Bituminous Coal
Coal (Organically derived sedimentary rock)
sedimentary
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Coal
Bituminous Coal (organic sedimentary rock)
sedimentary
Weathered River Rock (likely Chert or Basalt with algae)
Silicon dioxide (SiO2) with organic biofilm
sedimentary
Limestone with Bitumen/Chert
Calcite (CaCO3) containing organic hydrocarbons
sedimentary
Bituminous Coal
Bituminous coal (Organic Sedimentary Rock)
sedimentary
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Ambergris
Ambergris (Coprolite-adjacent organic substance)
Organic (Geological interest)
Purple Agate (Dyed Chalcedony)
SiO2 (Silicon Dioxide) with organic dyes
mineral
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
sedimentary
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
sedimentary
Dyed Pink Quartzite (Jadeite Simulant)
Silicon Dioxide (SiO2) with organic dye
metamorphic
Fossiliferous Limestone
Carbonate Rock (CaCO3 with organic inclusions)
sedimentary
Fossilized Shell Fragment / Mother of Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral
fossil
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
fossil
Amber
Succinite (C10H16O)
mineraloid
Coal (Bituminous or Anthracite)
Carbonaceous sedimentary rock (primarily Carbon, C)
sedimentary
Limestone with Fossil Inclusion
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Mineral/Fossil
Natural Pearl (appearing in a jewelry setting)
Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin
mineral
Fossilized tooth, likely a mammalian tooth fragment
Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth
fossil