Onyx is a banded variety of the oxide mineral chalcedony. It has a long history of use for hardstone carving and jewelry, where it is usually cut as a cabochon, or into beads (our favorite). Metaphysically, onyx can help release negative emotions, such as sorrow and grief. It can also be worn to defend against negative energy that is directed toward you. It fortifies self-confidence and responsibility, sharpens your senses, and encourages a healthy egotism.