Black obsidian is beneficial for strength, digestion of anything that is hard to accept, and detoxification. in addition to carrying the generic properties of obsidian, this shamanic stone removes disorder from the body and powerfully draws off negativity and repels curses. grounding the soul and spiritual forces into the physical plane, black obsidian brings them under the direction of the conscious will. black obsidian forces facing up to one's true self, taking you deep into the subconscious mind, magnifying negative energies so they can be fully experienced and released. this healing affect can work on the ancestral and family line.