An extremely rare diamond believed to be from outer space will be going up for auction next month. Auction house Sotheby’s Dubai will be selling the 555.55-carat black diamond, known as "The ...

A rare 555.55-carat black diamond, named "The Enigma," has been listed for auction by Sotheby's and is expected to sell for more than $6 million. The diamond was unveiled in Dubai on Tuesday and ...

A 555.55-carat black diamond that is truly from out of this world has been unveiled by auction house Sotheby’s Dubai. The rare gem, which Sotheby’s has dubbed “The Enigma,” is believed to ...