sedimentary
Petrified Wood
Silicified wood (Quartz replacement)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, waxy to vitreous luster, amorphous crystal structure, and coloration ranging from brown to multicolored due to mineral impurities.
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Physical properties
Hardness of 7 on the Mohs scale, waxy to vitreous luster, amorphous crystal structure, and coloration ranging from brown to multicolored due to mineral impurities.
Formation & geological history
Formed when buried vegetation is slowly replaced by silica-rich groundwater over millions of years, often dating from the Triassic period and earlier.
Uses & applications
Used primarily for ornamental carvings, polished display specimens, and high-end jewelry or decorative tabletops.
Geological facts
The petrification process preserves microscopic cellular details of the original tree, allowing scientists to identify ancient plant species.
Field identification & locations
Identify by wood-like grain patterns combined with conchoidal fracture and extreme hardness; commonly found in arid regions like Arizona and Madagascar.
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