‘Mellon Blue’ diamond sells for $26.6 million at Swiss auction
The pear-shaped 9.51-carat “Mellon Blue” — named for the late American arts patron Rachel “Bunny” Mellon — had been expected to fetch $20-$30 million at the Christie’s auction.
The pear-shaped 9.51-carat “Mellon Blue” — named for the late American arts patron Rachel “Bunny” Mellon — had been expected to fetch $20-$30 million at the Christie’s auction.