RING In platinum, the openwork wreath-shaped basket centred on a brilliant-cut diamond weighing approximately 1.80 ct in a surround of white gold wires finished with diamonds. Circa 1950. A diamond and platinum ring set with a brilliant cut diamond weighing approximately 1.80 ct. Circa 1950. RC : Stone size: 7.9 - 8.0 x 4.9 mm approx. Estimated colour: L Estimated purity: VS2 TDD: 54; US: 7 (changeable) Gross weight: 8.5 g (Pt - 950)