An opal and diamond cluster ring, centred with a large oval cabochon opal, 11.00mm x 15.00, in yellow gold claw setting, to a cushion-shaped surround of round brilliant cut diamonds, into a white gold pierced gallery and a plain hoop. Stamped 750. 6.76g Ring size M½ (leading edge) Buying this gemstone ring at auction could save up to 0.42 tonnes of CO2e compared to buying new. Condition Report: White opal displays a vibrant mainly green to blue play of colour. Appears to be in unworn condition, with minor scuffs. Opal weight stated as 3.96ct Diamonds approx. 0.60 -0.65ct in total.