The world's largest diamond sold at auction for $4.28 million It was sold for 3.16 million pounds ($4.28 million) during an auction in London. The rare black diamond called "Enigma" (enigma) and considered the largest natural diamond in the world, according to Sotheby's reported.And that was recorded as the most beautiful diamond in the world, because it is the largest diamond in the world, and the specialists said that this diamond is believed to be this type of black diamond that originates either as a result of meteorite collisions (with Earth) that cause chemical vapor deposition, or it may be originating from outside the planet,it's really very beautiful thing that god have created.😍❤️