Black Onyx is a strength-giving stone and can provide support for self-discipline issues. Since it helps to hold physical memories, Black Onyx can be useful in healing old wounds or past life issues. Being a powerful protection stone, it absorbs and transforms negative energy, and helps to prevent the drain of personal energy. It fosters wise decision-making and aids the development of emotional and physical strength and stamina, especially when support is needed during times of stress, confusion or grief.