Rock Identifier
Petrified Wood (Silicified Wood (SiO2)) — fossil
fossil

Petrified Wood

Silicified Wood (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, exhibits vitreous to dull luster with variegated brown, red, and yellow colors, and preserves cellular wood structures.

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Physical properties

Hardness of 7 on the Mohs scale, exhibits vitreous to dull luster with variegated brown, red, and yellow colors, and preserves cellular wood structures.

Formation & geological history

Formed through permineralization when buried organic wood is progressively replaced by silica-rich groundwater over millions of years.

Uses & applications

Used primarily in lapidary arts, decorative items, high-end landscaping, and as a sought-after collectible specimen.

Geological facts

Petrified wood maintains the exact microscopic cellular architecture of the original ancient trees, turning organic tissue completely into solid quartz.

Field identification & locations

Identify by its distinct tree bark and grain texture coupled with a high weight and stone-like hardness. Common in places like Arizona and the US West.

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