Jewellery, 19th/20th Century Design & Ceramics

AN OPAL AND DIAMOND CLUSTER RING the oval solid white opal is set within a surround of single-cut diamonds, in platinum and 18ct. white gold, size M, a diamond cluster ring, set with single-cut diamonds, in 18ct. gold, size J 1/2, a diamond three stone ring, set with three circular-cut diamonds, in platinum and 18ct. gold, size J 1/2, and an amethyst and diamond cluster ring, the cushion-shaped amethyst is set within a surround of rose-cut diamonds, size J.