A diamond necklace by Harry Winston. Photo Christie's Image Ltd 2014

Designed as a graduated series of circular-cut diamonds, trimmed with smaller circular-cut diamonds, spaced by pear-shaped diamonds, mounted in platinum, 15¾ ins., detaches into four sections and may also be worn as a shorter necklace of 13¼ ins and two bracelets of 6¾ and 6¼ ins., with maker's marks, in a Harry Winston navy leather box. With maker's marks for Harry Winston Estimate $180,000 – $250,000

Christie's. IMPORTANT JEWELS, 10 June 2014, New York, Rockefeller Plaza - http://www.christies.com/