Sotheby's did not disclose the identity of the seller of the brooch, and said that the buyer was a "private collector." ...

Napoleon’s brooch led the auction of 65 royal and noble jewels, which achieved a “white glove” result—every lot sold—for a ...

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

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

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 ...

A legendary jewel of the Hapsburg dynasty — not seen since 1919 and thought lost, stolen or recut — has actually been safe in ...