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

The 5.5-carat stone drew multiple bidders as collectors sought rare colored diamonds, Christie’s said, and it sold in about 20 minutes.

  • On Wednesday, Christie's sold the 5.5-carat 'Ocean Dream' blue-green diamond in Geneva for $17.3 million, setting a record price for its kind at auction. An unspecified private client purchased the stone in about 20 minutes.
  • Unearthed from Central Africa in the 1990s, the 'Ocean Dream' was sourced from South Africa's famed Cullinan mine and previously sold at Christie's in 2014 for roughly $8.5 million. Wednesday's price more than doubled that valuation.
  • The final price easily exceeded the presale estimate of $9.2 million to $12.3 million, fetching more than 13.5 million Swiss francs. Kadakia noted the rapid 20-minute sale pace reflected strong collector demand.
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'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.

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A 5.5-carat triangular cut diamond, which was promoted as the largest intense greenish blue diamond ever known, was sold on Wednesday for more than 13.5 million Swiss francs ($17.3 million), reported the auction house Christie’s, which assured that it was a record price for a stone of its type. The “Ocean Dream”, the most prominent piece of Christie’s jewellery auction in Geneva, was found in Central Africa in the 1990s. The price easily exceede…

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Daily Gate City broke the news on Wednesday, May 13, 2026.
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