Zentron Crystal Collection's top quality Rough Green Sheen Obsidian is a beautiful addition to your gemstone collection or new project. This black stone with a dark green sheen is said to deter negative energy and enhance mental and emotional clarity. This versatile stone can be used for: Cabbing, tumbling, lapidary, jewelry, cutting, decoration, reiki or metaphysical practice, and more! Our authentic, natural crystals are sourced from all over the world and come packaged in a velvet bag for safe handling and easy storage.