This Specimen has been sold.
5.3" Polished Petrified Oak Wood Stand-up - Oregon
Here is a beautiful, 5.3" wide, polished section of petrified wood from the Eocene age Stinking Water Creek deposits of Oregon. It displays fabulous rich wood tones and detailed wood structure. This specimen would have been surface collected. One face has been cut at an angle and polished to a glossy finish while the remainder of the log has a natural surface. The base has been cut flat so that it stands up nicely on a hard surface without the need for a display stand.
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.