African Petrified Wood Agate 6-7mm Table Cut Cube Bead - 15-16 Inch R1755 It forms when Quartz and

It forms when Quartz and Feldspar crystallize in radial aggregates within other silica-rich stones

” Most deep red Carnelian has been heat treated to darken the beautiful orange and red tints that are created by iron oxides in the stone

Viking explorers used thin pieces of Iolite as the world’s first polarizing lens to help them determine the exact location of the sun for navigation

and as such is a particularly soft stone

red and white -- as well as for its opacity and patterns

African Petrified Wood Agate 6-7mm Table Cut Cube Bead - 15-16 Inch R1755 It forms when Quartz andPetrified 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.