Three natural pearl and diamond necklaces. Photo Sotheby's

Each designed as a row of natural pearls to a rectangular clasp set with circular-cut diamonds, lengths approximately 490, 560 and 630mm. ESTIMATE 10,000-15,000 GBP. Lot Sold: 49,250 GBP

NOTE: Accompanied by three certificates from The Gem & Pearl Laboratory nos. 04442, 04443 and 04444 all stating the pearls are natural, saltwater.

Sotheby's. Fine Jewels. Londres | 14 Dec 2011 www.sothebys.com