


Black Obsidian:
Height: 2.1"
Width: 1.1"
Weight: 18 grams
Height: 2.1"
Width: 1.1"
Weight: 18 grams
ObsidianĀ is produced when felsic lava extruded from a volcano cools rapidly with minimal crystal growth. Obsidian is commonly found within the margins of rhyolitic lava flows known as obsidian flows.