OBSIDIAN Gold Sheen Large (20-30mm) polished stones 1 lb. HAND SORTED most are between 1/4 and

most are between 1/4 and 5/8 inch long

Medium - 12 to 25mm or 3/4 to 1"

so around 1/2"

Banded Grade A Purple from Namibia

OBSIDIAN Gold Sheen Large (20-30mm) polished stones 1 lb. HAND SORTED most are between 1/4 andOBSIDIAN Obsidian is also known as "volcanic glass" as it is formed when rapidly cooling lava has a high silica content and other conditions are present. Normally, Obsidian is black but other minerals or properties in the lava can cause coloration. A very common colored obsidian is a brick red variety called "Mahogany Obsidian". Gold and silver "sheen" obsidian are relatively uncommon. Gold sheen is caused by gas bubbles aligned along layers of lava