A 102.34, carat, D colour and flawless white diamond held by a model is displayed at Sotheby's auction house in London, Thursday, February 8, 2018. The diamond is the world largest known round brilliant diamond to have achieved “perfection in all critical criteria – Colour, Clarity, Cut and Carat”, and is expected to reach considerably over 33.7 million dollars by private sale in London. (Photo by Alastair Grant/AP Photo)
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