A simply Gorgeous 16.75ct Australian Black Opal & Diamond Platinum ring, approx 20-30 years old. The star of the show is unquestionably the magnificent and immense central Opal – the background colour is a medium to dark blue with flashes of light blue and green. No cracks, crazing or blemishes. Any white marks, lines or ‘commas’ are simply reflections of light and are not present on the gem. Absolutely beautiful! The diamonds are clean and white and total 0.60ct. Size 6 approx.