This Specimen has been sold.
4.6" Polished Petrified Wood Section - Oregon
This is a section of petrified wood collected near McDermitt, Oregon which has been cut diagonally and polished. It stands up nicely on a flat surface and is 4.6" tall, 4.3" wide and weighs 2 1/4 lbs. The quality of the polishing is second to none with no dull marks or scuffing and it allows for the fossilized wood grain to easily be seen.
Petrified wood is the name given to wood that has been turned into stone (fossilized) through the process of permineralization. All of the organic matter becomes replaced by minerals, while much of the original structure such as tree rings in retained. For this to happen the wood needs to be buried in an environment both low in oxygen (preventing decomposition) and with flowing, mineral-laden water. The coloration is due to the various minerals that are present during fossilization. For example red colors are due to iron compounds, greens due to copper, etc.