banshren&reg; Natural Carved 30mm Tumbled Black Obsidian Sphere Ball Healing Crystal Material: Black Obsidian Weight: Approximately 28.7g Size: Approximately 30mm (that is about 1.2 inch) Quantity : 1 Obsidian is extremely evil evil spirit function, it can avoid the interference of negative energy and strongly defuse negative energy, but also to remove the unpleasant musty and adverse, it's best for personal wear or is placed at home. General with the right hand!