LONDON, United Kingdom (AFP) – “The Enigma”, the world’s largest known cut diamond at 555 carats, went under the hammer in London on Wednesday for £3.16 million ($4.3 million, 3.8 million euros) having recently gone on display for the first time. The rare black, or carbanado, diamond is believed to have been created when a meteorite or an asteroid hit Earth more than 2.6 billion years ago. The 555.55 carat, 55-faced diamond reached £3.16 million, excluding the […]