Enigma, 555.55 carat black diamond, sells for £3.16m

A treasure from interstellar space, “The Enigma”, weighing 555.55 carats, is an exquisite and extremely rare black diamond, which was auctioned by Sotheby’s for a record £3,161,000. The largest Fancy Black Natural Colour diamond in the world, reported by Gubelin and the GIA as of 2004, it was listed as the largest cut diamond in the world in the 2006 Guinness Book of World Records. An extremely rare occurrence, Enigma and its origins are shrouded in mystery – thought to have been created either from a meteoric impact or having actually emerged from a diamond-bearing asteroid that collided with Earth.