- Black Onyx, . It can help in releasing negative emotions such as sorrow and grief. It is used to end unhappy or bothersome relationships. Onyx jewelry is worn to defend against negativity that is directed at you. Black stones have protective energies in the sense that black is the absence of light, and therefore, can be used to create invisibility. Fortifies self-confidence and responsibility, Sharpens your senses and Encourages a healthy egotism.