A nearly 10-carat blue diamond was sold at an auction in Switzerland on Tuesday for 20.5 million Swiss francs ($26.6 million) ...

The Christie’s Geneva Magnificent Jewels auction at the Four Seasons Hotel des Bergues achieved more than $75.8 million.

Art collector Rachel Lambert “Bunny” Mellon’s blue diamond pendant, known as the Mellon Blue, has sold for $25.5 million at ...

The Mellon Blue, a vivid blue diamond weighing 9.51 carats, once owned by philanthropist Rachel 'Bunny' Mellon, sold in Geneva for $25 million. Named after Mellon, the diamond was previously set as a ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Rachel Lambert “Bunny” Mellon, the horticulturalist, philanthropist, art collector, and jewelry patron, ...

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A vivid blue diamond weighing 9.51 carats and previously belonging to Rachel "Bunny" Mellon, the aristocratic philanthropist ...

A 9.51-carat blue stone that once belonged to the heiress Bunny Mellon sold for $7 million less than at its last auction, a ...

GENEVA -- A blue diamond weighing nearly 10 carats has sold at auction in Switzerland for 20.5 million Swiss francs ($26.6 ...

Roselyn looked stunning with a shimmering diamond necklace, balancing the gown’s romantic softness. Her hair was styled in a ...

The top lot of the Sotheby’s auction was a 4.50-carat internally flawless oval mixed-cut fancy vivid blue diamond that ...