Petrified Wood

Petrification is the process by which organic material is converted into a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.

Wikipedia

I obtained three pieces of petrified wood from vendors at Richland Lithic and Lapidary Society events.  Two of the three didn't look like wood to me.  I wanted to show images that looked like wood.  One of the pieces, shown here, is about 1.25 (1 1/4) inches long and about .625 (5/8) inches in diameter.

Petrified Wood

This one looked like wood to me but it is definitely rock.

Petrification takes place through a combination of two similar processes: permineralization and replacement.  These processes create replicas of the original specimen that are similar down to the microscopic level, and require a minimum of about 10,000 years to take place. 

Wickipedia

 

Petrified Wood

By visual inspection, I can accept this as having been wood at one time.  Note the layer of quartz at the bottom.

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