Opal & Diamond Ladies Ring 10kt Yellow Gold. The ring is constructed with one marquise cabochon cut opal and eighteen diamonds in a bypass fashion setting. The opal weighs 0.55cts and the total estimated weight of diamonds is 0.22cttw. The ring shows wear but is still in good condition, it was cast and handset with a bright polished finish. Ring size: 6 3/4, it includes an insurance appraisal of $702.00.