BUSINESS‘The Rock’, Largest White Diamond, Sold at Auction for $21.9 MillionadminMay 12, 2022May 12, 2022 May 12, 2022May 12, 2022 The Rock, the largest white diamond ever sold at auction, fetched 21.7 million Swiss francs ($21.9 million) on Wednesday, well below this type of jewellery...