Ocean Dream Diamond Made the 12-Year-Hiatus Worthwhile

The Ocean Dream Diamond is coming back to the auction room with the drama of a tide that took twelve years to return.

On May 13, 2026, Christie’s will offer the 5.50-carat Fancy Vivid Blue-Green diamond during its Magnificent Jewels sale in Geneva, held at the Four Seasons Hotel des Bergues. Its estimate stands at CHF 7,000,000 to CHF 10,000,000 (approx $12.8m) placing it among the season’s most closely watched colored-diamond lots.

After merely 20 minutes in the auction room, the Ocean Dream successfully demanded 13.5 million Swiss francs ($17.3 million). Rahul Kadakia, president of Christie’s Asia Pacific, said that an unspecified private client was the buyer.

The result also marked a striking jump from the diamond’s previous auction performance. In 2014, the gem sold at Christie’s for about $8.5 million, after having already earned museum-level visibility as part of the Smithsonian’s Splendour of Diamonds exhibition in 2003. Tobias Kormind, managing director of online jeweler 77 Diamonds, described the sale as a fitting outcome, not an exaggeration by any means.

“A stellar result worthy of the world’s rarest blue-green diamond,” Tobias Kormind, managing director of online jeweler 77 Diamonds, said in a statement.

The breathtaking 5.51 fancy vivid blue-green diamond, cut in a triangular shape, is unlike any other diamond on Earth.

“I could spot it from across the room,” said Tom Moses, the Gemological Institute of America (GIA) executive vice president and chief research and laboratory officer. “I have never seen a natural blue-green diamond of this intensity of color, size, and it is a Type IIa, which certainly makes it a unicorn.”

Ultimately, the Ocean Dream Diamond returned to Geneva with more than rarity on its side. It carried provenance, museum memory, geological mystery and the kind of color that makes even seasoned gemologists sound almost stunned.