With a final closing bid of $ 4.28 million, an anonymous buyer just became the new owner of the 555.55-carat black diamond known as the Enigma. The sale of this bizarre stone has reignited a long ...

Some black diamonds do have cosmic origins, but those gems created by meteorite impacts are usually much smaller than the Enigma. McCoy tells NPR it could have formed underground on Earth some 4 ...

The rare black, or carbonado, 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 ...

The black diamond - which is called 'The Enigma' - is billions of years old. It's believed to have formed when a meteorite hit the Earth 2.6 to 3.8 billion years ago.

Dubbed “The Enigma,” the 555.55-carat diamond is the star of a single-lot sale at Sotheby’s Dubai this week. Also known as a carbonado, it is the largest cut diamond in the world, according ...

A bigger, less pure black diamond was discovered in Brazil in the late 1800s, but it was found above ground and was believed to have been part of a meteorite.

Only known to exist in Brazil and the Central African Republic, “carbonado” black diamonds date from around 2.6 to 3.8 billion years ago and are an extremely rare natural occurrence.

The origins of carbonados have long baffled scientists. Black diamonds don't adhere to the rules of diamond mineralogy, and they don't occur in the usual places where clear diamonds are found.

There's a diamond going up for sale. It's said to be out of this world. Get this; it's a black 555.55-carat diamond that fits in the palm of your hand. A MARTÍNEZ, HOST: The auction house Sotheby ...

The Botswana government says the huge 2,492-carat diamond is the second-biggest ever discovered in a mine. It's the biggest diamond found since 1905. It weighs approximately half a kilogram.

Black diamond, largest ever cut, sells for £3.2 million Experts took three years turning the stone into a 55-face jewel and it recently went on show in Dubai (above), Los Angeles and London.