Gum petrified wood round section from Washington
This round section comes from the Vantage, Wa area around the Ginkgo Petrified Forest.
16 million years old.
Petrified wood consists mostly of silica in the form of minerals chalcedony and opal.
Petrified wood (from the Greek root petro meaning "rock" or "stone"; literally "wood turned into stone") is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization.
This was once a living tree that turned to stone over a period of millions of years with lava, and minerals from the water.
It measures at 11 3/8 x 9 5/8 x 5/8 thick.