A black diamond weighing a staggering 555.55 carats is going up for auction at Sotheby's and living up to its name "The Enigma." Bidding opens on Feb. 3 at 6 a.m. PST (1400 GMT) and closes on Feb.

Last week at Sotheby’s Dubai, a 555.55 carat black diamond called “The Enigma” was unveiled and it will become the largest faceted diamond of any kind to appear at auction when it goes under ...

It has got taste, sophistication and whimsy of enigma. According to the Instagram bio of Azature Pogosian, he is the innovator of "$250K Black Diamond Nail Lacquer". This would roughly approximate ...