Oregon Black Rainbow Obsidian Raw Natural Large Stone. See photos and video for details. Colors may appear slightly different in photos. Obsidian occurs only where geologic processes create volcanoes and where the chemical composition of the magma is rich in silica. Obsidian-bearing volcanoes are typically located in or near areas of crustal instability or mountain building. In North America, obsidian is found only in localized areas of the West, where the processes of plate tectonics have created geologic conditions favorable to volcanism and the formation of obsidian. Obsidian typically forms near the end of a volcanic cycle and is often associated with domes of volcanic rock, such as the hills of Glass Buttes, Oregon. Obsidian is a powerful stone with spiritual symbolism, practical uses and protective properties. Used to bring luck, ward off evil spirits, and provide spiritual grounding. It has the potential to reduce stress and anxiety, promote physical healing benefits and provide spiritual healing attributes. Obsidian can be harnessed for protection, grounding, tranquility and personal growth through cleansing & charging rituals or incorporating it into personal space. Makes a great giftable gift idea for someone special or treat yourself! New to poshmark? Use code: VAMPIEKITTY to sign up & save $10 off your 1st order.