The Rock, the biggest white diamond ever auctioned, sold for a hammer price of 18.6 million Swiss francs ($18.8 million) on Wednesday, far short of the record for such a jewel.
The 228.31-carat stone, larger than a golf ball, was sold by Christie’s auction house in Geneva. The world record for a white diamond still stands at $33.7 million, fetched in the Swiss city in 2017 for a 163.41-carat gem.
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