12. OPAL AND DIAMOND RING - French assay mark for 18 carat gold (750°/00) - Closet-set to the centre with a white opal cabochon, surrounded by brilliant-cut diamonds and highlighted by four reverse-set diamonds - Ring size R (59) - Gross weight: 23.30 grams Overall condition: good, superficial wear in form of scratches, areas of oxidation Metal stamped and tested for 18 carat gold and platinum Opal with some play of colour - small flashes of orange, green and blue throughout, with some surface wear to cabochon visible under 10x magnification Diamonds: approx. 0.40 ct, I-J-K colour, SI-I clarity This condition report is provided for your convenience based on the opinion of our gemmologists. Bonhams is not responsible for any discrepancies between this information and other opinions.