Black onyx crystals can be used for grounding, protection, and self-control, and as a shield against negative energy. 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. Grounding and calming, our Black Onyx Tumble Stones are a wonderful stone to have in your life. Onyx is said to bring strength and allow us to see past fear. It is believed to root spiritual energy in the body and benefit the nervous system. Each tumble stone has been tumble polished, a process that smoothness and polishes the crystal to reveal its unique color and form. Tumble stones are a wonderful way to enjoy crystals, whether for their beauty or healing powers. Our tumbled stones make an ideal healing crystal - the perfect size to hold, place on the body or carry with you. They make great gifts and we have a wide range of inexpensive tumbled stones to add to your crystal collection or bring a little natural beauty into your home.