Petrified wood
Silicified fossil wood, commonly quartz/chalcedony (SiO₂) replacing wood
fossil
Category
Organic Specimen (Fossil)
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Concretionary Sandstone
Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
mineral
Sandstone
Arenite
sedimentary
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Fossilized shell or coral fragment
Indeterminate biogenic carbonate; likely calcite/aragonite (CaCO₃)
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
fossil
Polished fossil tooth, likely shark tooth
Fossilized selachian tooth; possible sand tiger shark (Carcharias sp.) or related lamniform
fossil
Fossil-bearing limestone, possibly a crinoid or shell fragment
Calcite (CaCO₃) limestone containing an indeterminate marine fossil
fossil
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
fossil
Amber
Succinates (Fossilized Tree Resin)
mineraloid
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossil Coral (Favosites Honeycomb)
Favosites (Genus), Phylum Cnidaria, Class Anthozoa
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fossiliferous limestone pebble
Calcite-rich limestone containing possible brachiopod or coral fossil impressions
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossil coral pebble
Likely fossilized colonial coral, commonly Favosites or a related tabulate coral
fossil
Fossiliferous Limestone (with Crinoids/Coral)
Fossiliferous Limestone (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (Permineralized wood)
fossil
Amber
Succinite (Fossilized Tree Resin)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Fossilized Coral
Hexagonaria (Rugose coral) / Calcium Carbonate (CaCO3)
fossil
Fossilized Shell in Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Siltstone with Fossil Cast
Sedimentary Rock (Siltstone / Fine-grained Sandstone)
sedimentary
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Fossil Coral
Rugose or Tabulate Coral Fossil (CaCO3 replacement)
fossil
Fossiliferous Limestone
CaCO3 (with biological inclusions)
sedimentary
Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)
Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)
fossil
Fossil Shark Tooth
Lamniformes (order) - likely Cretalamna or Carcharias species
fossil
Fossilized Brachiopod
Brachiopoda (Phylum)
fossil
Petrified Wood
Silicified wood / Permineralized wood (SiO2)
fossil
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Fossil Shark Tooth
Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite
fossil
Chert (Arrowhead Point)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Amber
Succinite (fossilized tree resin)
mineral
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary