Snowflake Obsidian, Large Flake, Rough Rock, per lb

Rough Snowflake Obsidian from Utah. This Obsidian is black with natural "snowflakes" of large light gray spherulites that give the material an over-all spotted appearance. The spots are formed through devitrification when molecules within glass (which has no crystal structure) change their structure and crystallize. Size ranges between small pieces under 3", or larger, whole chunks up to 10lbs. 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. 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. Typical Obsidian is a semi-translucent black that can have slight tints of green or brown.