Petrified Wood
Silicified wood / Permineralized wood (SiO2)
fossil
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Learn about Mineral (Silicate Replaced Organic Material) in the encyclopedia
View all →
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Jasper
Chalcedony (SiO2)
mineral
Fossiliferous Limestone / Petrifaction
Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)
fossil
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified wood (SiO2)
fossil
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Graphite-rich metamorphic rock (graphitic schist)
Graphitic schist; chiefly graphite (C), quartz (SiO₂), and mica minerals
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Jasper
Silicon dioxide (Quartz variety), SiO2
sedimentary
Graphite-bearing schist (probable)
Graphite schist; chiefly quartz, mica, and graphite
metamorphic
Fossilized Bone / Dinosaur Fossil
Fossilized vertebrate bone (permineralized)
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. indet.
fossil
Shark Tooth Fossil
Carcharodonta (order Lamniformes), likely Carcharias spp.
fossil
Seashell Fossil
Gastropoda fossil
fossil
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)
sedimentary
Petrified Wood
Silicified Wood / Chalcedony (SiO2)
mineral
Black Jasper
Black Jasper (Silicate mineral - SiO2)
sedimentary
Polished agate-like stone (uncertain; possibly a fossil or shell fragment)
Likely microcrystalline quartz (chalcedony), SiO₂; exact identification is limited by the image
mineral
Fossilized wood or plant fragment
Petrified wood (silicified fossil wood; commonly Araucarioxylon or related taxa)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Mammoth Tooth
Mammuthus tooth
fossil
Polished fossil coral
Agatized or silicified coral, commonly fossilized stony coral (Scleractinia); exact genus cannot be determined from the image
fossil
Petrified Wood
Silicified Wood (Silicon Dioxide - SiO2)
fossil
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
sedimentary
Green Chert (Jasper)
Microcrystalline Quartz (SiO2) with chlorite/epidote inclusions
sedimentary