fossil
Petrified Wood
Petrified Wood (Silicified Wood)
Hardness 6.5-7, brown/tan color, dull to slightly waxy luster, shows distinct wood grain structure
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Physical properties
Hardness 6.5-7, brown/tan color, dull to slightly waxy luster, shows distinct wood grain structure
Formation & geological history
Formed through permineralization where organic wood material is replaced by silica (quartz/chalcedony) over millions of years
Uses & applications
Collecting, lapidary arts, jewelry, decorative items
Geological facts
Petrified wood is the state fossil of several US states including Washington and North Dakota.
Field identification & locations
Identified by its woody grain texture and stone-like hardness. Common in areas with ancient volcanic ash deposits.
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