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A Harry Winston pear-shaped diamond ring. Photo Christie's Image Ltd 2014

Set with a modified pear-shaped diamond, weighing approximately 5.23 carats, flanked on either side by a tapered baguette-cut diamond, mounted in platinum. Signed Winston for Harry Winston. Estimate $200,000 – $300,000

With report 2135158115 dated 2 April 2011 from the Gemological Institute of America stating that the diamond is F color, VVS1 clarity; accompanied by a working diagram indicating that the clarity of the diamond may be potentially internally flawless

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