Schungite
Carbon-rich mineraloid (Amorphous carbon)
mineral
Category
Organic (Paper And Cellulose)
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Jasper
Microcrystalline quartz (SiO2)
sedimentary
Fossilized Bone
Vertebrate Fossil (Biogenic sediment)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Fossilized Bone
Fossilized vertebrate bone
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth
Chondrichthyes tooth fossil
fossil
Petrified Wood
Silicified Wood (Quartz replacement of organic wood)
fossil
Fossilized Shark Tooth
Chondrichthyes teeth
fossil
Petrified Wood
Silicified wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood / Fossilized Xylem
fossil
Limestone with Fossil
Bioclastic limestone (CaCO3)
sedimentary
Coprolite
Fossilized Feces
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Oil Shale
Kerogen-rich marlstone
sedimentary
Possible petrified wood or fossilized tooth
Unidentified silicified fossil; exact identification requires close examination
fossil
Petrified Wood
Silicified wood (SiO2)
sedimentary
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
mineral
Dragon's Blood Resin
Dracaena resin / Organic exudate
mineral
Fossilized Turtle Bone
Testudines fossil
fossil
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Fossilized Bone Fragment
Vertebrate Fossil
fossil
Operculum (Shiva's Eye / Cat's Eye Shell)
Biogenic Aragonite / Calcite (CaCO3)
gemstone
Mother of Pearl
Nacre (Aragonite and Conchiolin)
fossil
Amber
Succinite (Organic Gemstone)
mineral
Fossiliferous Limestone (Shell Fragment)
Biogenic Limestone (Calcium Carbonate / CaCO3)
sedimentary
Red coral bead strand (likely dyed or treated coral)
Corallium spp. (calcareous coral skeleton; primarily CaCO₃)
fossil
Fulgurite
Lechatelierite (Silica glass)
mineral
Soil Clod / Caliche Nodules
Pedogenic Calcrete / Clay aggregate
sedimentary
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Mother of Pearl and Onyx
Aragonite (Mother of Pearl) and Chalcedony (Onyx)
mineral
Pearl (in Marcasite Jewelry)
Biogenic Calcium Carbonate (primarily Aragonite, CaCO3)
gemstone
Flint with Fossil Inclusion
Cryptocrystalline quartz (SiO2) enclosing fossilized organic remains
sedimentary
Amber (and Cubic Zirconia)
Fossilized Tree Resin
mineraloid
Petrified Wood
Silicified wood (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amber
Fossilized tree resin
gemstone
Petrified Wood
Silicified wood (permineralized organic tissue)
fossil
Likely bituminous coal
Coal, predominantly maceral-rich carbonaceous material (composition varies)
sedimentary
Crocodile Jasper
Microcrystalline Quartz (SiO2)
sedimentary