Genuine onyx gemstones are set by hand along with rainbow border of crystals. A fun piece where vintage style meets the Fun color on sterling silver cufflinks. An unexpected flash while perfectly complementing the natural gemstones. handmade with 925 Sterling Silver Features an anti-tarnish rhodium finish that makes for lasting wear Black Onyx with Crystal Rainbow set in the border Packaged in black lacquered wood display box & a velour gifting & travel pouch Matching tuxedo studs are available upon request