Biggest black diamond up for sale at Sotheby's

The record-breaking 555.55-carat black diamond, dubbed the Enigma, is up for sale at Sotheby's. The online sale of the stone will take place on February 3-9 in Dubai, Report informs.

The owner of the diamond, who has not been named, purchased it in rough form in 1999 or 2000. Then the weight of the stone was more than 800 carats, and its processing took several years, as a result of which it has 55 facets. Sotheby's adds that this is the largest fancy natural black diamond in the world. In 2006, it entered the Guinness Book of Records as the largest cut diamond in the world.

The Enigma will be put up for auction without a reserve price, that is, it will go to a buyer, who offers the highest price, regardless of the market value of the diamond. Cryptocurrency will be accepted as payment.