20. OPAL RING - French assay mark for 18 carat gold (750°/00) - Closet-set to the centre with an oval-shaped yellow opal - Ring size R (59) - Gross weight: 7.82 grams OVERALL CONDITION: Good, light scratches throughout. OPAL: Measurements: 15.40 x 12.15 x 7.30 mm Displaying a yellow, red, orange, blue, green play of colour. Please note that these stones have not been tested for origin of colour. MARKS: "750" 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.