Brazilian Black Tourmaline in Stand 12fd6da072997352587730a9225ad91d Petrified Wood is an unique

Petrified Wood is an unique form of fossilization

it is considered an ornamental and semi-precious stone

or they migrated away from warm climates

and a void will not fill completely

Heteromorph Ammonites had uncoiled shells

Brazilian Black Tourmaline in Stand 12fd6da072997352587730a9225ad91d Petrified Wood is an uniqueAlbite, Elbaite, also known as Tourmaline, is a group of mixed crystals with the following major members, Elbaite, Dravite, Schorl, Buergerite, Tsilaisite, and Uvite. The general color range of the mineral's family are colorless, pink, green, blue, yellow, brown, and black. What distinguishes tourmalines are the three sided cross sections that are different than any other mineral.