Switzerland Jewelry Auction

FILE - Sotheby's Deputy Chairman, Middle East & Head of Sotheby's UAE, Katia Noun Boueiz wears the Mediterranean Blue diamond during its worldwide debut in Abu Dhabi, United Arab Emirates, Tuesday, April 8, 2025.

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'Ocean Dream' blue-green diamond sells for more than $17 million at Christie's auction in Geneva

'Ocean Dream' blue-green diamond sells for more than $17 million at Christie's auction in Geneva

Christie's says a 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist has sold for more than 13.5 million Swiss francs or $17.3 million. The auction house said it was a record for a stone of its kind sold at auction. The “Ocean Dream” was the standout offer at the auction house’s Geneva sale of jewelry on Wednesday. It was found in Central Africa in the 1990s. The price easily topped the presale estimate to fetch 7-10 million francs or around $9-13 million. The buyer was an unspecified private collector.