A perfect 163-Carat diamond just sold at auction for $34 million in Geneva on Tuesday. The diamond is the centerpiece of a gem-studded necklace, and exceeded house expectations of $25 million. It is the largest diamond ever sold. The most expensive diamond ever sold for $71 million and was a 59.6 carat pink-star diamond. (source) 4:29 p.m. ET November 14, 2017
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