Black Obsidian powerfully eliminates negative energies in oneself and one’s environment. It is said to cleanse the auric field of disharmony, negative attachments and one’s own anger, greed, fear and resentment. Obsidian is also a strong spiritual protection stone, and is a great aid to healing the body and the soul.To some, crystal skulls may represent doom and destruction, and to some, hope and healing. Some people think that crystal skulls can be used like crystal balls to see visions of the past, present and future.35mm tall.