Petrified Wood Sphere- Medium and High Quality Hand shaped and polished from Petrified Wood found in fossilised forests in Madagascar. Petrified Wood is actually a fossil of a woody plant preserved by mineralization through time by chemical and physical processes. The original organic material is replaced, usually by some type of silica (which in turn becomes Agate, Jasper, Chert, or other forms of Quartz). However, because the preservation took place slowly over time, you can still clearly see the pattern of the original wood. As with all natural stone, colors vary. Each is unique! If you prefer to order by telephone or by fax, click here for more information. Product Number GFPW100