Beatriz Obsidian BoxHand carved and polished solid obsidian box. The deep black obsidian is mined communally in the Mexican state of Hidalgo and worked by hand in a workshop near the Pyramid of the Moon in Teotihuacn. A smooth, glass like volcanic rock, obsidian has been a tool of healing for thousands of years and is said to counter fear, anxiety, and anger, and to clear negative energy from the psyche.