Onyx is a crystalline form of quartz. The colors of its bands range from white to almost every color (save some shades, such as purple or blue). Considered to be extremely beautiful, our onyx cufflinks are ideal for use during that important formal engagement. Available in a variety of designs, our onyx cufflinks selection varies from silver onyx cufflinks to black onyx cufflinks and they will let you stand out, while at the same time remaining classic.