sedimentary
Petrified Wood
Silicified Wood (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, earthy to vitreous luster, amorphous crystal structure, specific gravity around 2.5 to 2.7, exhibiting preserved cellular wood grain colors of brown, tan, and grey.
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Physical properties
Hardness of 7 on the Mohs scale, earthy to vitreous luster, amorphous crystal structure, specific gravity around 2.5 to 2.7, exhibiting preserved cellular wood grain colors of brown, tan, and grey.
Formation & geological history
Formed when buried organic wood is slowly replaced by minerals like quartz or chalcedony groundwater over millions of years.
Uses & applications
Used for decorative carvings, lapidary arts, jewelry, and collector display specimens.
Geological facts
The petrification process can preserve microscopic cellular structures of ancient trees dating back hundreds of millions of years.
Field identification & locations
Identify in the field by its distinct wood-like grain patterns combined with a stone-like weight and high hardness; commonly found in ancient floodplains and volcanic ash beds worldwide.
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