sedimentary
Petrified Wood
Silicified wood (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous to waxy luster, amorphous crystal structure, and specific gravity around 2.5 to 2.7.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous to waxy luster, amorphous crystal structure, and specific gravity around 2.5 to 2.7.
Formation & geological history
Formed through permineralization, where groundwater rich in dissolved silica replaces organic plant material over millions of years.
Uses & applications
Used for decorative carvings, lapidary arts, jewelry, and as collector specimens.
Geological facts
The cellular structure of the original tree is often preserved down to microscopic detail, allowing scientists to identify ancient plant species.
Field identification & locations
Identify by wood grain patterns combined with a stone-like weight and hardness; found worldwide in ancient floodplains and volcanic ash beds.
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