Lava Bracelet 07 Stretch 10-11mm Black Stone Volcanic Crater Round Beaded (Gift Box) Measures: approx 10-11mm beads [x-small: 5-7", small: 6-7", medium: 7-8", large: 8-9"] Chakra Balancing: Root Chakras Stone Properties: Lava healing crystals help decision making, stability and strength. Limited-Edition: Natural Black Lava is beaded on your new crystal healing bracelet. These are matte black, porous stones full of natural craters. Lava is a rock formed from magma erupted from a volcano. It is an igneous rock of volcanic origin. Its "primal energies" come from spending so much time deep in the Earth's core in a molten state before it is formed upon entry to the earths surface. The Black Lava crystals are polished into 10mm to 11mm round beads and strung on sturdy bracelet stretch cord for a flexible wear. Includes: 1 Lava Bracelet & Gift box when purchased from I Dig Crystals.