Obsidian Bracelet 19 Mahogany Stretch Round Black Red Volcanic Stone 9-10mm (Gift Box) Measures: approx 9-10mm beads [x-small: 5"-6", small: 6"-7", medium: 7"-8", large: 8"-9"] Chakra Balancing: Root Chakras Stone Properties: Obsidian to transmute negative energies to positive; protecting the aura. Limited-Edition: Natural Mahogany Obsidian healing crystals are strung on your new stretch bracelet. These are black volcanic stones with red Iron inclusions. Because of a high concentration of Iron, it has reddish-brown coloring, with black inclusions, and resembles fine grains of mahogany wood. The Mahogany Obsidian is polished into smooth 9mm to 10mm round beads and strung on sturdy bracelet stretch cord for a comfortable and flexible fit. Includes: 1 Mahogany Obsidian bracelet & Gift box when purchased from I Dig Crystals.