sedimentary
Petrified Wood
Silicified Wood (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, variable colors including red, brown, and grey, vitreous to waxy luster, and microcrystalline quartz structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, variable colors including red, brown, and grey, vitreous to waxy luster, and microcrystalline quartz structure.
Formation & geological history
Formed through permineralization, where organic wood material is buried under sediment and replaced by silica-rich groundwater over millions of years.
Uses & applications
Used for ornamental carvings, decorative tabletops, jewelry, and prized by mineral collectors.
Geological facts
Famous deposits include the Petrified Forest National Park in Arizona, which dates back over 200 million years to the Triassic period.
Field identification & locations
Identified by retaining the original cellular structure and growth rings of wood despite being entirely replaced by stone.
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