Glass Buttes Obsidian is a black, brown, green, or mottled black-brown obsidian. The color becomes dull when heat-treated. When weathered it becomes light gray. It has a vitreous texture. Deposits ...
L-552 (Burns Green Obsidian): Direct Collection from outcrop. Provenience includes bedrock. Not a collection from archaeological context. Collection includes raw material, outer surface, and naturally ...