Obsidian is a grounding stone that provides an instant connection from the Root Chakra deep into the core of the Earth. Obsidian will help to clean and remove negative energies in a sacred space or environment.
It also assists in releasing those emotions/reactions that cause negative energy such as anger, jealousy, greed, resentment, etc.
Once these energies are removed/released, Obsidian will help to keep the space protected.
Obsidian is used for healing and releasing energy blockages, and has a tendency to work quickly to move truths to the surface to be resolved.
Obsidian is used to help those unable or unwilling to let go of the past.