The rarest Fancy Black Diamond “Enigma” weighing 555,55 carats, a new lot of Sotheby’s, is on the mind of all gem hunters. In the history of auction sales, this is an absolute record – up to this point, stones of much more modest sizes were put up for auction. However, the time has come for this diamond, inscribed in the Guinness Book of Records in … Continue reading 555 carats of “Black Magic”