Opal, Diamond, 18k Yellow Gold Pendant Enhancer. Featuring one opal cabochon measuring approximately 17.9 x 9.7 mm, accented by six full-cut diamonds weighing a total of approximately 0.10 cttw., set in an 18k yellow gold pendant enhancer mounting measuring approximately 36 x 16 mm. {Gross Weight: 3.3 dwts}