Petrified Wood
Silicified Wood (SiO2)
metamorphic
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
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Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Brecciated Jasper / Fossiliferous Jasper Egg
Cryptocrystalline Quartz (SiO2) with iron oxides and mineral inclusions
sedimentary
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
fossil
Fossilized Shark Tooth
Chondrichthyes (class) fossilized tooth
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (Permineralized organic matter, głównie $SiO_2$)
fossil
Fossilized Horse Tooth
Equus sp. (fossilized molar)
fossil
Chert (and Fossilized Brachiopod shell)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Chert Nodule (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Shark Tooth
Elasmobranchii dentition (calcium phosphate / hydroxyapatite)
fossil
Glauconitic Sandstone
Glauconitic Quartz Arenite (with K,Mg,Fe,Al silicate hydroxide)
sedimentary
Fossil Coral / Crinoid Stem section
Anthozoa / Crinoidea fossil
fossil
Jasper
Microcrystalline Quartz (SiO2 with iron oxide impurities)
sedimentary
Chert Concretion with Iron Oxide Staining
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Petrified Wood
Silicon Dioxide Fossilized Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Petrified Wood
Silicified Wood (Quartzo-feldspathic fossil wood)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified wood
Silicified fossil wood, primarily quartz (SiO₂) replacing cellulose
fossil
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Asphalt aggregate
Human-made bituminous asphalt containing crushed silicate rock aggregate
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Chert (Septarian Nodules-like)
Silicon dioxide (SiO2)
sedimentary
Fossilized wood, likely silicified petrified wood
Silicified wood (fossil wood; commonly quartz/chalcedony replacing organic tissue)
fossil
Fossilized tooth, likely shark tooth
Fossilized selachian tooth; possibly a worn Otodus or related shark tooth
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Weathered chert or silicified limestone
Microcrystalline quartz (SiO₂), likely chert formed by silicification of carbonate rock
sedimentary
Rough Chalcedony / Jasper Agate Nodule
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary