Petrified wood sphere set Very nice sold spheres of petrified wood with natural crystals that take you back in time. Petrified wood comes from fossilised wood, in which all the organic materials have been replaced by minerals. This keeps the structure of the wood beautifully preserved. Set of 2 beautiful spheres of petrified wood from Madagascar Total weight of the set: 1640 grams Sphere of petrified wood = weight: 890 grams Diameter: 8.50 cm and circumference: 26.7 cm Sphere of petrified wood = weight: 750 grams Diameter: 8.59 cm and circumference: 27 cm