Editor’s Note
A rare 9.51-carat fancy vivid blue diamond, known as the ‘Mellon Blue,’ has sold for $26.6 million at Christie’s Geneva.
Auction Result
The ‘Mellon Blue’, a 9.51-carat fancy vivid blue pear-shaped diamond, has been sold for US$26.6 million at a Christie’s auction in Geneva, Switzerland.
Gemstone Details
The diamond was previously estimated to fetch between US$20 and US$30 million. It was displayed during a preview at Christie’s in Geneva on Friday, November 7, 2025, ahead of the sale.
Context
The sale underscores the continued strength and high value of top-tier colored diamonds in the global luxury auction market.
