Gold Sheen Obsidian Hexagon Necklace opal contains spheres of silica

opal contains spheres of silica

Its name comes from the Latin word "fluere"

Stone: Amethyst on Green Aventurine

You will receive the slab pictured

Some of the largest specimens discovered have measured up to 10-inches long

Gold Sheen Obsidian Hexagon Necklace opal contains spheres of silicaSize: ~ 2. 0 in. (18 20 in.) Weight: ~ 0. 60 oz Chemical Formula: SiO (Amorphous Volcanic Glass) Commonly found in Brazil, Mexico, Japan, Afghanistan, and the United States. Obsidian is a naturally occurring form of volcanic glass. Obsidian forms as lava cools very rapidly and is not considered a mineral as its lacks any form of crystal structure. It is said that obsidian is actually a mistranslation from Pliny the Elder's Natural History. The first