Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Organic Specimen (Fossil)
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Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Fossilized Shark Tooth
Elasmobranchii dentition (calcium phosphate / hydroxyapatite)
fossil
Amber
Succinite (Fossilized Tree Resin)
fossil
Concretionary Sandstone
Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)
sedimentary
Flint with Fossil
Silicon dioxide (SiO2) microcrystalline quartz with fossiliferous inclusions
sedimentary
Sandstone Pebbles
Arenite
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Chert (Nodular or Fossiliferous)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Coral limestone / fossil coral
Biogenic calcium carbonate, chiefly aragonite or calcite (CaCO₃); likely fossilized colonial coral
fossil
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Petrified Coral (Agatized Coral)
Anthozoa (Agatized Fossil)
sedimentary
Fossiliferous limestone (likely crinoidal or shell limestone)
Calcite-rich limestone; predominantly CaCO₃, with visible fossil fragments
fossil
Fossil tooth, possibly shark tooth
Indeterminate fossilized vertebrate tooth; likely a shark tooth (possibly *Carcharhinus* or related genus)
fossil
Fossil shell fragment, likely brachiopod or bivalve
Indeterminate fossilized carbonate shell; possibly Spiriferida (brachiopod)
fossil
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Fossilized Bone Chunk (likely Dinosaur or Large Mammal)
Permineralized Fossil Bone
sedimentary
Agatized fossil fragment, possibly silicified coral
Chalcedony (microcrystalline SiO₂) replacing carbonate fossil material
fossil
Ferruginous Sandstone with Concretion
Sandstone (SiO2 dominated with Fe2O3 cement)
sedimentary
Fossiliferous Sandstone (with Brachiopod or Bivalve mold)
Clastic Sedimentary Rock with Macrofossil Mold
sedimentary
Calcite on Limestone (or Fossil)
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)
Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Oyster in Flint
Gryphaea or Exogyra embedded in SiO2 (Flint/Chert)
fossil
Sandstone
Arenite
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (Porous/Travertine variant)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Petrified Wood
Silicified Wood (Silicon Dioxide - SiO2)
fossil
Grey Limestone
Calcium Carbonate (CaCO3)
sedimentary
Baltic Amber
Succinite (Fossilized Tree Resin)
fossil
Siltstone with Fossil Cast
Sedimentary Rock (Siltstone / Fine-grained Sandstone)
sedimentary
Fossiliferous Shale
Sedimentary Clastic Rock with fossil inclusions (likely Brachiopod or Bivalve impressions)
fossil
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Amber and Tumbled Stones
Fossilized Tree Resin (Succinite)
fossil
Amber
Succinite (Resinite)
fossil
Amber
Succinite (fossilized resin)
mineral
Conglomerate with Fossilized Shark Teeth
Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains
sedimentary
Fossilized Shark Teeth
Otodus sp. (Eocene Sand Tiger/Mackerel Shark)
fossil
Fossil Coral (Favosites Honeycomb)
Favosites (Genus), Phylum Cnidaria, Class Anthozoa
sedimentary
Crinoid and Coral Fossils in Limestone
Fossiliferous Limestone with Rugosa (order) and Crinoidea (class)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary