Golden Obsidian Natural 6mm Round Large Hole Beads - 8 Inch Stone Type_Boulder Opal mineral deposits can create stone

mineral deposits can create stone in the place of the decaying wood

Distinctive for its purple-and-gray tones

but also for industrial purposes from watch gears and scientific instruments to sandpaper and other abrasives

after its type locality

Golden Obsidian Natural 6mm Round Large Hole Beads - 8 Inch Stone Type_Boulder Opal mineral deposits can create stoneGolden Obsidian is a naturally occurring volcanic glass, shiny black with a golden sheen. Obsidian is produced when lava erupts from a volcano and cools rapidly with minimal crystal growth. It is sometimes used for scalpel blades in cardiac surgery, as Obsidian can be formed into a blade many times sharper than steel surgical blades. Approximate Hole Diameter: 2mm