Golden Obsidian Natural 6mm Round Large Hole Beads - 8 Inch Stone Type_Boulder Opal after its type locality

after its type locality

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

To create Cherry Quartz

rainbow effect of light refracting off of the air bubbles inside of the stone

a 19th-century German professor of chemistry and mineralogy

Golden Obsidian Natural 6mm Round Large Hole Beads - 8 Inch Stone Type_Boulder Opal after its type localityGolden 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