A natural pearl necklace

The single strand of 103 graduated pearls measuring from 8.2 to 6.3 mm to the sugarloaf sapphire and single-cut diamond clasp, 82.5 cm long. Estimate £20,000 - £30,000 ($32,320 - $48,480) - Price Realized £55,250 ($89,284)

Accompanied by report No. 1/16786 dated 4 February 2009 from the AnchorCert laboratory stating extensive samples were found to be natural pearls.

Christie's. Jewellery. 10 June 2009. London, King Street www.christies.com