Genuine rhodium plated engagement ring with. 88 carats of prong set blue and clear cubic zirconia polished into a lustrous silvertone finish. what's your birthstone? our wonderful bella birthstone engagement ring is 12 different birthstone colors. Get yours today! our genuine rhodium finish is achieved using an electroplating process that coats the item with heavy layers of rhodium a close cousin to platinum which gives our jewelry a platinum luster.