Geneva: A triangular-shaped blue-green diamond fetched a price of $17.3 million. The “Ocean Dream” is a 5.5 carat fancy vivid blue-green diamond that was auctioned off at Christie’s Geneva auction house on Wednesday and broke all previous records for such diamonds. It came as no surprise to any one in attendance that it would sell.
Rahul Kadakia, President of Christie’s Asia Pacific, revealed that a private individual who purchased the diamond did not disclose their name. The amount paid was 13.5 million Swiss francs, which exceeded the estimated price of between 7 to 10 million Swiss francs before the sale began.
The Stone Itself Is Unlike Anything Else
Christie’s billed the Ocean Dream as the largest fancy vivid blue-green diamond known to exist. That is not marketing language. Blue-green diamonds of any size are extraordinarily rare. A stone this large, this vivid, this perfectly cut there is simply nothing else like it in the documented world.
Miners pulled it from Central Africa sometime in the 1990s. Before it became a nine-figure auction lot, it was a scientific marvel. The Smithsonian featured it in its Splendour of Diamonds Exhibition in 2003 alongside the rarest coloured diamonds on earth. Then Christie’s sold it in 2014 for roughly $8.5 million. That felt significant at the time. Wednesday’s price more than doubled it.
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Tobias Kormind, managing director of online jeweller 77 Diamonds, put it plainly. “A stellar result worthy of the world’s rarest blue-green diamond,” he said.
The Market for Rare Coloured Diamonds Is Red Hot
This sale does not exist in isolation. Both Christie’s and Sotheby’s say collectors are chasing rare coloured diamonds with growing intensity. These stones make up only a tiny fraction of everything mined globally. Supply does not grow. Demand does.
The contrast with Sotheby’s Tuesday sale tells the full story. A 6-carat fancy vivid blue diamond from South Africa’s legendary Cullinan mine the same source that produced some of the most famous diamonds in history failed to find a buyer. The presale estimate sat between 7.2 and 9.6 million francs.
Sotheby’s was measured about it. “Although the diamond didn’t find a buyer during the auction, we are now in conversations with several interested parties and are confident that it will find a new home soon,” the house said. One auction falls short. The next one breaks records. That is the coloured diamond market right now volatile, rarefied, and driven entirely by whether the right buyer is in the room on the right day.
What This Means Going Forward
The Ocean Dream’s $17.3 million result sets a new floor for extraordinary blue-green diamonds. Every future stone of comparable quality will be measured against Wednesday’s number. For collectors still on the fence about coloured diamonds, that 20-minute bidding window sends a clear message. When something truly rare surfaces, it does not wait.
