Black onyx has a calming quality, which can be beneficial in working with challenging emotions such as grief and anxiety. Black onyx also helps to balance yin and yang. It helps us to feel centered, make wise decisions, and get to the root cause of issues. A fantastic grounding stone; black crystals are fantastic for absorbing negative energy and deflecting it away from the aura, transmuting negative energy into positive. 
Beautiful hand crafted white and midnight blue polymer clay mushroom with black onyx crystal at the bottom and onyx detail, with gold flakes. Simply stunning