Rock Identifier
Petrified wood (likely iron-stained) (Silicified fossil wood; commonly quartz/chalcedony (SiO₂) replacing wood) — fossil
fossil

Petrified wood (likely iron-stained)

Silicified fossil wood; commonly quartz/chalcedony (SiO₂) replacing wood

AI-generated identification · may be incorrect

Wood-grain and growth-ring-like textures are preserved; pale cream to rusty brown with earthy or waxy luster. Typically Mohs 6.5–7, microcrystalline quartz, with no distinct cleavage; iron oxides may cause the brown coloration.

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Physical properties

Wood-grain and growth-ring-like textures are preserved; pale cream to rusty brown with earthy or waxy luster. Typically Mohs 6.5–7, microcrystalline quartz, with no distinct cleavage; iron oxides may cause the brown coloration.

Formation & geological history

Buried wood was mineralized as silica-rich groundwater replaced or filled its tissues, preserving the structure. Petrification occurred at an unspecified time; the image alone cannot establish its age.

Uses & applications

Polished or cut pieces are used for display, lapidary work, and jewelry; petrified wood may also be collected as a fossil specimen.

Geological facts

The visible grain-like pattern supports petrified wood, though the photograph cannot confirm composition or rule out ordinary weathered wood.

Field identification & locations

Check for mineral hardness and a stone-like interior; genuine material is generally far harder and heavier than wood. Petrified wood occurs worldwide in sedimentary deposits, including well-known localities in Arizona and Madagascar.

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