Christie’s auctions precious jewels at Four Seasons des Bergues in Geneva, Switzerland

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The largest ever “flawless” heart-shaped diamond to appear at auction will go under the hammer at Christie’s sale of precious jewels in Geneva this month and is expected to fetch up to $20 million. The 92-carat pendant suspended from a pearl sautoir is the showcase piece at Christie’s spring sale, set for May 17 at the ultra-luxe Four Seasons des Bergues hotel on the shores of Lake Geneva.