fossil

Petrified wood

Silicified wood, commonly quartz or chalcedony (SiO₂) replacing ancient wood

AI-generated identification · may be incorrect

Elongated, wood-grained specimen with ochre, brown, cream, and gray bands. Silicified material is typically Mohs 6.5–7, vitreous to waxy, and lacks prominent cleavage; the pictured surface appears weathered or cut.

Identified October 4, 2026More fossil →

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Physical properties

Formation & geological history

Buried wood can be mineralized as silica-rich groundwater replaces its tissues, preserving grain and sometimes growth rings. This process occurs in many geological periods; the specimen’s age and locality cannot be determined from the image.

Uses & applications

Collected and sometimes polished for display, carvings, and jewelry; larger pieces may be used decoratively.

Geological facts

Iron oxides commonly create the yellow, orange, and brown coloration in petrified wood.

Field identification & locations

Wood-like grain and banding support the identification, though the photo alone cannot confirm it. Petrified wood occurs worldwide, including notable deposits in Arizona, Madagascar, and Indonesia; avoid acids or harsh cleaning.