African Petrified Wood Agate 6mm Round - 15-16 Inch #9189 that were deposited in shallow

that were deposited in shallow sea beds

including Diamond

according to the Mohs hardness scale

The original stones were often used as protective amulets and are usually scarred or pitted in places where they were ground off for use in traditional medicines

African Petrified Wood Agate 6mm Round - 15-16 Inch #9189 that were deposited in shallowPetrified Wood Agate is formed from the petrifaction process of primeval trees over the course of many years. Petrification occurs when the wood is covered by sedimentary rock, as waters loosen and decompose the organic elements and replace them with silicate substances, while maintaining the wood's original structure. Preservation is enabled by a lack of oxygen.