A pair of sapphire and diamond ear pendants, by Van Cleef & Arpels. Photo Christie's Image Ltd 2014

Each detachable pendant set with either a cushion or oval-cut sapphire, within a circular-cut diamond surround, to the similarly-set surmount, mounted in gold. Signed Van Cleef & Arpels, N.Y., no. 51164. Estimate $25,000 – $35,000

Christie's. MAGNIFICENT JEWELS, 16 April 2014, New York, Rockefeller Plaza - www.christies.com