15-1/2" Petrified Wood Slab, Nevada (with stand) Teeth

15-1/2" Petrified Wood Slab, Nevada (with stand) TeethFrom ancient Greek meaning "wood turned into rock", Petrified Wood is an unique form of fossilization. In some instances all the organic matter has been replaced by minerals (usually a silicate, such as quartz) during a process called permineralization replacement. However, many petrified wood specimens undergo a unique fossilization process, where silicates bond with the cellulose structure of the wood, thereby preserving organic matter. Regardless

(more than 8 feet long) putting it among the largest of any land animal that has ever lived

tapered at the edges

The many colors in which corundum occurs are due to the presence of other trace minerals

The increase in temperature results in deeper or more vivid colors especially in smokey quartz and amethyst

the Pleistocene Grey Wolf

000 years ago with a few notable exceptions

continued until the Neolithic revolution

“Seeding” a pearl means inserting a bead of a predetermined shape and size into the tissue of a mollusk in order to control the shape of the pearl

This sometimes allows for multi-colored specimens (watermelon tourmaline) to sometimes form

and is a super deal for this quality material

small reptiles

and Heliodor