Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
mineral (silicate-replaced organic material)
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2)
fossil
Mammoth or Mastodon Tooth Fossil
Mammuthus / Mammut tooth
fossil
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
sedimentary
Bamboo Leaf Jasper
Silicified Siltstone or Jasper (SiO2)
sedimentary
Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Green Jasper
Jasper (Silicates, SiO2)
sedimentary
Petrified Wood / Fossilized Bone
Silicified / Mineralized Fossil (Silica SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized bone fragment
Fossil bone, composed chiefly of carbonate-fluorapatite (bioapatite)
fossil
Coprolite
Fossilized Feces
sedimentary
Ferruginous Sandstone (with possible trace fossils)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Yellow Jasper (Chert)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Shark Tooth
Selachimorpha fossil
fossil
Mammoth Molar Fossil
Mammuthus primigenius (Tooth fragment)
fossil
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Dinosaur Claw Fossil
Fossilized Theropod Claw (Vertebrate Palaeontological Specimen)
fossil
Petrified Wood
Silicified Wood (Permineralized wood)
fossil
Fossilized Shell
Invertebrate fossil (Bivalvia or Brachiopoda)
fossil
Banded Jasper
Silicate Mineral (Microcrystalline Quartz / SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
mineral
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified wood (Quartz replacement, SiO2)
fossil
Coprolite
Fossilized Feces
fossil
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Shark Tooth Fossil
Chondrichthyes (shark) tooth
fossil
Fossilized Shark Tooth
Carcharhinus sp. (likely Bull or Requiem shark family)
sedimentary
Petrified Wood Fragment
Silicified Wood (SiO2)
fossil