The triangular-cut Ocean Dream diamond fetched approximately $17.3 million (CHF 13.56 million) at Christie's Geneva in May 2026, outperforming its presale expectations. This result marked a major gain over the roughly $8.5 million the SI1-clarity gemstone brought at the same auction house twelve years earlier. Cut from an 11.70-carat rough stone mined in Central Africa in the 1990s, the diamond lost over half its original weight during fashioning. Beyond the salesroom, the natural marvel was previously exhibited at the Smithsonian National Museum of Natural History alongside other legendary gems.
Key points
Natural radiation created structural defects known as color centers that gave the gemston…: Natural radiation created structural defects known as color centers that gave the gemstone its distinctive blue-green hue.
The diamond stands as the largest known specimen recorded within its specific color class…: The diamond stands as the largest known specimen recorded within its specific color classification.
Cutting and polishing the rough Central African stone reduced its weight by more than hal…: Cutting and polishing the rough Central African stone reduced its weight by more than half to yield the final triangular cut.
Sources checked by our analysis pipeline: 1
Diamonds, formed deep within the Earth, have become the ultimate symbols of luxury, wealth and timeless beauty. But some are so rare that their value goes far beyond their size and sparkle. Diamonds are not just another gemstone; historically and socially, they have become a greater part of human civilisation. From India's Kohinoor and France's Regent Diamond to literally every engagement ring, the preciousness of these stones has overlapped with the preciousness of our moments.
One such gemstone is the Ocean Dream, a 5.50-carat natural blue-green diamond that recently sold for $17.3 million at Christie's Geneva auction in May 2026. What makes the sale particularly interesting is that the same diamond had also appeared at an auction 12 years earlier, when it fetched approximately $8.5 million. In other words, its dollar-denominated auction price has nearly doubled in just over a decade, making it one of the most remarkable sales in the coloured diamond market.
What makes the Ocean Dream diamond so rare?
The Ocean Dream (Source: Chrities official website)
The Ocean Dream is not an ordinary blue diamond. According to…
Creative practitioners displaced by clashes between the Sudanese Armed Forces and Rapid Support Forces are organizing grassroots workshops and music programs in safe havens like Port Sudan. These cultural initiatives aim to counter social division and engage youth despite immense personal loss and damaged heritage sites. The efforts continue even as the country's broader cultural sector faces a devastating $30 million funding deficit.
Law enforcement personnel have been deployed across urban areas in the capital to actively reinforce public safety measures. To manage the heightened operations, officers are establishing barricades and closing off roadways. These strategic interventions also include conducting routine checks throughout various city locations.
Cockroach Janata Party founder Abhijeet Dipke expressed disappointment after Punjabi singer Diljit Dosanjh distanced himself from a student protest during a recent performance. Dosanjh addressed his critics on stage, defending his career choices and artistic role while asserting that he will not be told how to fight his battles. Despite the political friction, Dipke maintained his respect for the performer's authenticity and international achievements.