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A Christie's employee displays “Bleu Royal”, a rare 17,61 carats internally flawless fancy vivid blue pear shaped diamond, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 35 to 50 million USD.The auction will take place in Geneva, on November 07, 2023. (Photo by Martial Trezzini/Keystone vía AP Photo)
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