Black Obsidian is a very grounding healing crystal, and opens and balances the Root Chakra. All forms of Obsidian are used for transmuting negative energy to positive vibrations, thus protecting the aura from unwanted energies. Obsidian healing crystals also aid with grief and help us to overcome bad habits and obsessions. It helps get in touch with buried issues before they explode.
Physically, Obsidian healing crystals benefit the stomach, intestines, muscle tissue, and can help overcome infections.