The "Ocean Dream" diamond sold for approximately $17.3 million [2] at a Christie's auction in Geneva on Wednesday, May 13, 2026 [2].
The sale marks a significant milestone for the gemstone market because the stone is the largest known fancy vivid blue-green diamond [1]. Its rarity drove a competitive bidding process that resulted in the highest price ever paid for a diamond of this specific color and type at auction [3].
Weighing five and a half carats [1], the diamond is distinguished by its rare hue and triangular cut. The final hammer price was recorded as 13.5 million Swiss francs [1]. While some reports rounded the total to $17 million [5], the primary record indicates a final value of $17.3 million [2].
Christie's hosted the event in Switzerland, where the stone attracted global collectors. The auction house said the blue-green vivid saturation is a combination rarely seen in stones of this size. This scarcity ensures that the Ocean Dream remains a singular asset in the luxury jewelry market.
Market analysts said that the demand for high-carat, colored diamonds continues to outpace traditional clear stones. The result of this specific sale reinforces the trend of investors treating rare gemstones as stable stores of value during volatile economic periods. The Geneva auction served as a showcase for the enduring appeal of natural, high-grade colored diamonds.
“The 5.5-carat fancy vivid blue-green stone set a new auction record for its type.”
The record-breaking sale of the Ocean Dream diamond signals a strengthening appetite for 'investment-grade' colored gemstones. Because fancy vivid blue-green diamonds are significantly rarer than traditional white or even pure blue diamonds, this price point establishes a new valuation ceiling for the category. It suggests that ultra-high-net-worth collectors are increasingly prioritizing extreme rarity and unique color saturation over traditional size metrics.
