White Gold Rhodium Bonded Cocktail Ring with Large Onyx Cubic Zirconia in a Bezel Setting in Silvertone. The Onyx Cocktail Ring is the result of great craftsmanship. It contains a shiny silver tone and a large onyx stone-- a silhouette that's as popular as ever. White Gold Rhodium Bond is achieved using an electroplating process that coats the item with heavy layers of rhodium a close cousin of platinum that costs three times as much which gives our jewelry a platinum luster.