African Petrified Wood Agate 6x8mm Corner Drilled Table Cut Cube Bead - 15-16 Inch dec14 It occurs with wave-like bands

It occurs with wave-like bands of charcoal gray

Onyx is a black and white banded Chalcedony

often called the "Super Seven" or "Melody Stone" contains Amethyst

which tends to be a strong blue color

These flecks glitter as they catch the light and appear green against the dark glass

African Petrified Wood Agate 6x8mm Corner Drilled Table Cut Cube Bead - 15-16 Inch dec14 It occurs with wave-like bandsPetrified 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.