An Art Deco diamond dress ring, circa 1925, the old cushion-shaped diamond in hexagonal-shaped setting, to a bombé mount of geometric design alternately set with single-cut diamonds and calibré sapphires, the underside with scalloped detailing and the shank with foliate engraving, mounted in platinum, (sapphires deficient), principal diamond weight approximately 0.95 carat, ring size L - M. £1,000-£1,500