An exquisite vivid oval blue boulder opal and diamond cluster ring set in platinum. The long oval boulder opal is collet set in mille grained platinum and has a border of eight-cut diamonds scallop set in mille grain edged platinum. The ring is embellished with naturalistic pierced openwork undercarriage. Estimated opal weight: 2.09cts. Estimated total diamond weight: 1.10cts. Assessed diamond colour: H-I. Assessed diamond clarity: VS-SI.