A Sapphire and Diamond Necklace, by Van Cleef & Arpels. Photo: Christie's Images Ltd 2012

The front suspending a graduated fringe of cushion-cut sapphires, each within a circular and marquise-cut diamond frame, from a line of circular-cut diamond florettes spaced by circular-cut sapphires, to the circular-cut diamond backchain, mounted in platinum, 17 ins. Estimate $150,000 - $250,000

Signed Van Cleef & Arpels, N.Y., no. 29868 

Christie's. Magnificent Jewels, 17 April 2012, New York, Rockefeller Plaza