18ct two-tone gold, sapphire, onyx and diamond ring, the marquise shaped plaque, centring a bezel-set marquise-cut sapphire weighing approxiamtely 1.50 carats, within a surround of brilliant-cut diamonds together weighing approximately 0.18 carats and a further surround of black onyx, size P, diamonds approximately F-H colour, Vs-Si clarity, weight approximately 9.6 grams