A stunning and exceptionally rare blue-green diamond, known as 'The Ocean Dream,' has fetched US$17 million at a Christie's auction in Geneva, Switzerland. The gem, weighing 5.50 carats, is the largest fancy vivid blue-green diamond ever to appear at auction. Its pre-sale estimate ranged from 7 million to 10 million Swiss francs (approximately US$7.7 million to US$11 million), but the final price far exceeded expectations, reflecting the intense demand for rare colored diamonds.
A Gem of Unmatched Rarity
The Ocean Dream is classified as a fancy vivid blue-green diamond, a color combination that is exceedingly rare in nature. The hue is caused by the presence of boron and nitrogen during the diamond's formation deep within the Earth. Only a handful of such diamonds have ever been discovered, making this specimen a true collector's item. The diamond was set in a ring and presented at Christie's Geneva Magnificent Jewels sale, where it attracted global attention from private collectors and investors.
Auction Highlights
The sale took place on May 13, 2026, at the Four Seasons Hotel des Bergues in Geneva. Christie's had previewed the diamond on May 7, giving potential buyers an opportunity to admire its exceptional clarity and color. The final hammer price of US$17 million places The Ocean Dream among the most valuable colored diamonds ever sold at auction. The identity of the buyer has not been disclosed.
The diamond's name, 'The Ocean Dream,' evokes the deep blue-green shades of tropical seas, a fitting tribute to its mesmerizing appearance. Experts note that the gem's vivid saturation and even color distribution are key factors in its high value.
Market Context
The sale comes at a time when the global luxury market remains robust, with rare gemstones continuing to appreciate in value. Colored diamonds, especially those with vivid hues, have seen consistent demand from wealthy collectors seeking alternative investments. The Ocean Dream's sale price per carat—over US$3 million—underscores the premium placed on exceptional color and size.
Christie's has a storied history of auctioning record-breaking diamonds, including the legendary 'Blue Moon' and 'Pink Star.' The Ocean Dream now joins this elite group, solidifying its place in the annals of gemstone history.
