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A diamond, rubellite tourmaline and yellow sapphire bracelet, by David Webb. Photo: Christie's Images Ltd 2013

Set with a rectangular-cut yellow sapphire, within a circular-cut diamond foliate surround, to the variously-shaped rubellite tourmaline cluster band with circular-cut diamond detail, mounted in gold and platinum, circa 1966, 6 ins., in a David Webb black leather case. By David Webb. Estimate:  $25,000 – $35,000

With certificate of authenticity from David Webb 

Christie's. MAGNIFICENT JEWELS. 15 October 2013. New York, Rockefeller Plaza.