15-1/2" Petrified Wood Slab, Nevada (with stand) Teeth continued until the Neolithic revolution

continued until the Neolithic revolution

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

“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

small reptiles

15-1/2" Petrified Wood Slab, Nevada (with stand) Teeth continued until the Neolithic revolutionFrom 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 In some instances all the organic matter has been replaced by minerals (usually a silicate, such as quartz) during a process called permineralization replacement.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