fossil

Petrified wood

Silicified fossil wood; commonly quartz (SiO₂) replacing woody tissue

AI-generated identification · may be incorrect

Wood-grain texture and tan, gray, and brown mineral bands are visible. Typically Mohs 6.5–7 with a glassy-to-dull luster; the image alone cannot confirm its mineral makeup or specific gravity.

Identified October 13, 2026More fossil →

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Physical properties

Wood-grain texture and tan, gray, and brown mineral bands are visible. Typically Mohs 6.5–7 with a glassy-to-dull luster; the image alone cannot confirm its mineral makeup or specific gravity.

Formation & geological history

Buried wood can be mineralized as groundwater deposits silica in its tissues, preserving the original structure. Petrified wood formed across many geological periods, from the Devonian to the present, depending on local conditions.

Uses & applications

Used for lapidary work, decorative objects, jewelry, and collecting; larger pieces may be used as architectural or display stone.

Geological facts

Petrification preserves wood’s growth rings and grain even though the original organic material has been replaced by minerals.

Field identification & locations

Identify it by its preserved wood grain and mineralized, stone-hard surface; common deposits occur in ancient volcanic ash and river sediments worldwide. A rough specimen of this apparent size may sell for about $10–$50, depending on locality, condition, and confirmed identification.