Obsidian is a strongly protective stone that helps to form a shield against negative forces and provides a cord from ones base chakra to the center of the earth. This kind of anchoring can be overwhelming for some since it works so fast but it can be extremely helpful for those working in the healing professions as it gets to the root of an issue quickly.
Metaphysically obsidian helps to eliminate energy blockages and release tension. This stone is known to anchor the spirit into the body. Emotionally obsidian helps you to know who you truly are by carrying you to the depths of your emotions.
Obsidian is a grounding and centering stone, it is quite effective when carried or utilized in protection ritual. By grounding spiritual energy in the physical plane, obsidian connects the mind and emotions. Absorbing and destroying negative energies, cleaning the subconscious blockages one may have, and then releasing stress.