A mysterious black diamond stumped experts for years until one Belgian cutter invented a new machine to shape the 612-carat ...

Empress Zita, Karl's widow, and her children later faced persecution by the Nazi regime due to their outspoken opposition to ...

The world's second largest diamond could soon find a new home in a museum or a sheikh's collection -- but first needs to be properly evaluated, the Belgian firm holding it told AFP Monday. Unearthed ...

A famous auction house has unveiled a rare black diamond that is possibly from outer space. On Monday, Sotheby's said, "The Enigma" is a 555.55-carat that will go on exhibit in Dubai, Los Angeles, and ...