News and Press

The Mellon Blue, a 9.51-carat pear-shaped diamond with internally flawless clarity

‘The Mellon Blue’ to Return to Auction, This Time at Christie’s The 9.51-carat fancy vivid blue diamond, which set two world auction records at Sotheby’s in 2014, is estimated to fetch up to $30 million. Lauren McLemorelauren.mclemore@nationaljeweler.com A blue...

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The historic fancy vivid blue diamond set to headline Christie’s Geneva sale next month could sell for up to $50 million.

23-Carat ‘Golconda Blue’ Heads to Auction   Lauren McLemorelauren.mclemore@nationaljeweler.com At its upcoming Geneva jewelry auction, Christie’s will offer the 23.24-carat “Golconda Blue,” a rare blue diamond with more than 250 years of history and ties to...

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