Sheen Obsidian, Rough Rock, per lb

Rough Sheen Obsidian from Mexico. Obsidian is an organically created glass, formed through felsic lava that rapidly cools after exploding past the earth’s crust. It exhibits conchoidal fracturing and is a hardness of 5 to 5.5 on the Mohs scale. Sheen Obsidian has metallic shine and chatoyancy when cut with its veining. This sheen is caused by tiny bubbles within its formation. Size range: 2 to 10 lbs. Primary image features the rock wet. If you have a preference on the size or number of rocks you will receive, please describe this in your order notes at checkout.