Very specular, brittle, see-through on thin edges, very dark, very smooth.
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. Obsidian is produced when felsic lava extruded from a volcano cools rapidly with minimal crystal growth.
Known as the "psychic vacuum cleaner," the Obsidian crystal is your spiritual maid service, working hard to clean up the emotional wreckage and debris from the past. A bodyguard to your soul, the Obsidian crystal stone also protects you from shadow traits like addiction, fear, anxiety, and anger and acts as a mirror to your inner self.