It is the premier stone for grounding and protection. It is often one of the first stones people purchase, particularly when they become aware that they are susceptible to other's energy or are under psychic attack. It is also useful in strengthening your psychic shield, clearing your aura of negativity and protecting you from EMF from electronic devices. Tourmaline is a stone of vitality and is great to move all types of energy and to provide energy to the user. It is also good for balancing the brain and clearing the mind through rationality, releasing stress and focusing on positivity. The black color aligns it with the root chakra although it can work with other chakras as well, particularly the sacral and solar plexus chakras.