GENEVA—The largest internally flawless fancy vivid blue diamond ever put up for auction sold for a staggering $43.8 million at a Christie’s sale of rare jewels in Geneva on Tuesday, the auctioneer said.
The vivid blue diamond, known as “Bleu Royal” and set in a ring, is among the rarest ever to be unearthed. At 17.6 carats, the diamond had an estimated value of up to $50 million prior to the sale.
