Rough Obsidian / 1.5-2.5" AVG - 1 KILO LOT

Quantity: 1 kilogram

Average size range: 1.5 to 2.5 inches

Obsidian is not a gemstone, but instead a kind of glass that forms when volcanic lava rapidly cools in the open air without forming any specific crystalline structures. When polished, obsidian can occasionally exhibit a gold, silver, or rainbow sheen depending on any included minerals.