Genuine Rhodium Plated Blue 1.8 Carat Oval Cubic Zirconia Engagement Ring Polished into a Lustrous Silvertone Finish. Feminine and elegant. Simple and sophisticated. Fashioned in luminous cubic zirconia this engagement ring is a lovely addition to any collection. Our genuine rhodium finish 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.