A vivid blue diamond weighing 9.51 carats and previously belonging to Rachel “Bunny” Mellon, the aristocratic philanthropist and a close friend of Jacqueline Kennedy, sold in Geneva for $25 million, Christie’s auction house said on Tuesday.
The internally flawless pear-shaped diamond mounted at the tip of a swirling ring design is named the “Mellon Blue,” after its former owner who had it set as a pendant. It sold for $32.6
