Obsidian Bracelet 24 Tumbled Black Rainbow Round Protection Stone Stretch (Gift Box) Measures: approx 16-18mm tumbled, 6mm round 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 Obsidian is strung on your new crystal healing bracelet. Obsidian is a black volcanic stone which may show subtle rainbow sheens. The focal stone is a smooth tumbled nugget bead strung with 6mm round Rainbow Obsidian beads. The natural stone beads are strung on a sturdy stretch cord for a comfortable and flexible fitting bracelet. Includes: 1 Obsidian bracelet & 1 Gift box when purchased from I Dig Crystals.