Rough Obsidian / 20-40g AVG - 1 LB. LOT

Quantity: 1 pound

Average size range: 20 to 40 grams

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.