In this file photo, an employee poses with a cushion-shaped 16.08-carat vivid pink diamond at Christie's auction house in Geneva. The gem was purchased by Hong Kong property tycoon Joseph Lau for his daughter on November 10, 2015. The billionaire also spent $48.39 million on a blue diamond, which he named “The Blue Moon of Josephine” on November, 2015, setting a world record for a gemstone at auction.(Photo/Agencies)
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