A sapphire and diamond dress ring, by Geoffrey Rowlandson, 1996 The pair of old brilliant-cut diamonds accented by single-cut diamonds between two cushion-shaped sapphires weighing 5.70 carats and 6.50 carats, mounted in platinum, diamonds approx. 0.65ct total, signed G. Rowlandson, maker's mark RLd, London hallmark, ring size approx. M½ For further information on this lot please visit Bonhams.com