Obsidian is considered by crystal healers and shamanic practitioners to be an excellent grounding stone which provides a shield of energetic protection around the bearer. 
 
Obsidian is a stone of truth, protection, integrity, honesty and grounding. This stone awakens the inner warrior and provides courage to enter our subconscious mind and rediscover our hidden abilities. Obsidian, in general, protects our mind from all sorts of negative energies. Because of its reflective, mirror-like surface, Obsidian works like a mirror in which we can clearly see our own mistakes and weaknesses. Moreover, this stone provides assistance and insight into the possible ways of correcting those mistakes. Obsidian is also believed to block the geopathogenic radiation.