Black Onyx tumbled stones are great for centering, wise decisions, happiness and centering. Black Onyx is a variety of agate and is also great for good fortune. Black Onyx crystal assists with emotional balance, self control and relieving stress. Onyx will purify negative emotions. Black onyx tumbled stone helps with hearing and listening to our inner voice. Black onyx helps us let go of the physical, relax and flow with the natural energies, bringing higher inspiration. Onyx assists with challenges in life and prevents the draining away of personal energy. Onyx assists us with perseverance, good morals, deep thoughts and spiritual strength. Onyx has been used for wound healing, childbirth and to increase stamina and self-control. Black onyx is associated with the root chakra and the astrological signs are Cancer and Aquarius