There are several varieties of obsidian, which is volcanic glass extruded as lava cools. Silver Sheen Obsidian displays a silver-gray iridescent sheen when polished and viewed in strong light, caused by gas bubbles aligning across the layers during formation. Helps with: Aura cleansing, grounding, releasing anger and resentment, protection against negative energy Chakras: Root Placement: On or near the root chakra, in the hands during grounding meditation Corresponding Astrological Sign: Scorpio, Sagittarius, Capricorn Silver Sheen Obsidian Comes from Mexico