A Diamond and Synthetic Sapphire Plaque Ring Circa 1950 The marquise shaped ring bezel set in 14ct white gold with a marquise cut blue synthetic sapphire weighing 6.44cts, mounted in a millegrained quatre foil design set with four single cut diamonds all totalling 0.29cts, surrounded by twelve further single cut diamonds totalling 0.40cts, with engraved shoulders and tapered band