Cabochon Cut Opal & Diamond Ring in Yellow GoldCabochon Cut Opal Diamond Ring in Yellow Gold. This memorizing opal and diamond cocktail ring features five (5) lovely . 23 carat iridescent opals which are each flanked on either side by . 01 carat accent diamonds. The ring is finished in 14 karat yellow gold which really adds to the glowing appearance of the five opals. The band features a lovely split design that concludes with highly polished and raised gold wrap element.