A citrine and diamond dress ring, by Geoffrey Rowlandson, 1999 The large heptagonal-cut citrine in a raised setting with a scalloped surround set with brilliant-cut diamonds, mounted in 18 carat yellow gold, diamonds approx. 0.45ct total, signed G. Rowlandson, maker's mark RLd, numbered, London hallmark, millennium mark, ring size approx. O For further information on this lot please visit Bonhams.com