Onyx is a gemstone whose significance can be interpreted in a variety of ways. A solid black Chalcedony, or a banded or layered black and white Chalcedony, is the most usual gemstone definition. Onyx is a name that can be applied to any engraved stone with a single color base, and any banded gemstone with parallel banding. Onyx is the most real black gemstone in its solid black form.

Rainbow Onyx
Multi Red Onyx
Multi Green Onyx