sedimentary
Petrified Wood
Silicified wood (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, vitreous to waxy luster, amorphous crystal structure, and exhibits preserved cellular wood grain patterns in shades of brown, red, and yellow.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, vitreous to waxy luster, amorphous crystal structure, and exhibits preserved cellular wood grain patterns in shades of brown, red, and yellow.
Formation & geological history
Formed when buried organic wood is slowly replaced by silica-rich groundwater over millions of years, typically in ancient floodplains and volcanic ash beds.
Uses & applications
Used primarily as decorative lapidary material, carved ornamental objects, unique jewelry, and coveted collector specimens.
Geological facts
Petrified wood can preserve microscopic cellular structures of ancient trees dating back hundreds of millions of years.
Field identification & locations
Identify by its distinct wood grain texture combined with a stone-like weight and conchoidal fracture. Commonly found in regions with ancient sedimentary deposits like the Petrified Forest in Arizona.
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