10MM Matte Black Onyx, Tiger's Eye, and Black Onyx Lava stone necklace Note: Please see chart for sizing A powerful protection stone, Black Onyx absorbs and transforms negative energy, and helps to prevent the drain of personal energy. ... Black Onyx aids the development of emotional and physical strength and stamina, especially when support is needed during times of stress, confusion or grief. Lava Stone is a grounding stone that strengthens one's connection to Mother Earth. It gives us strength and courage, allowing us stability through times of change. It provides guidance and understanding in situations where we may need to "bounce back". A calming stone, it is very useful in dissipating anger. A stone of protection, Tiger Eye may also bring good luck to the wearer. It has the power to focus the mind, promoting mental clarity, assisting us to resolve problems objectively and unclouded by emotions.