Black Onyx

Black onyx is a chalcedony with alternating black and white bands.  The only proper use for the term onyx is to describe the opaque chalcedony composed of straight, parallels bands of black and white. The term is used incorrectly when applied to grayish chalcedony or agate, which has been dyed since ancient times to produce a material known as black onyx.  It’s a great grounding and protective stone, which transmutes negative, and prevents personal energy drain.  Use black onyx for support during times of stress, when wise decisions are necessary, and when working with self-discipline.  Black onyx synthesizes yin and yang energies, and helps us deal with the duality of nature.  It is helpful when trying to remember your "roots". 

Physically, black onyx is beneficial to the bone marrow, soft tissue, and feet.

Black onyx is associated with the root chakra.