Sotheby’s Dubai auction house has unveiled a diamond that is literally from another world. Sotheby’s calls the 555.55-carat black diamond, believed to come from outer space, “The Enigma.” The rare gem was shown to reporters on Monday as part of a tour in Dubai and Los Angeles before being auctioned in London in February. Sotheby’s expects the diamond to sell for at least £5 million ($6.8 million). The auction house plans to accept the cryptocurrency as a possible…
