Onyx registers the gravitational pull of the earth so it's believed to be a strong grounding stone that aids concentration and absorbs negativity from the environment -- both of which help one center and align with higher powers.

Associated with eloquent communication, onyx is worn for public speaking engagements, but it can also help lovers find the right words with new romantic interests.

Used to enhance marital happiness (often enhanced by good communication skills), conversely, it is thought to be helpful when one needs to end an unpleasant relationship.

On the physical side, onyx helps the body retain strength, relieving the physiological symptoms of stress and strengthening bone marrow.