Source: New York Times
“A 9.51-carat blue diamond sold for $25.6 million at an auction in Switzerland on Tuesday — a steal compared to what it fetched a decade ago. The teardrop-shaped stone, which previously belonged to Rachel Lambert Mellon, the American heiress and art collector better known as Bunny, had last been auctioned in 2014, when it went for $32.6 million. But diamonds aren’t what they used to be. Christie’s, the auction house that put it up for bid on Tuesday, had predicted a lower selling price this time of $20 million to $30 million. It landed in the middle of that range.” (11/12/25)