This huge black diamond just sold for $4.3 million. No one knows where it came from.

Geologists still can't say for sure whether the enormous stone called the Enigma crystallized in Earth’s mantle or fell from outer space.

This huge black diamond just sold for £3.1 million. No one knows where it came from.

Black diamond, largest ever cut, sells for £3.2 million - Life & Style - Business Recorder

This huge black diamond just sold for $4.3 million. No one knows where it came from., Black Diamond

A Death on Diamond Mountain: A True Story of Obsession, Madness, and the Path to Enlightenment: Carney, Scott: 9781592408610: : Books

Painite Gemstone: Properties, Meanings, Value & More

55-Face Black Diamond, Largest Ever Cut, Sells for $4.3 Million In Crypto

Black 555.55-carat diamond dubbed 'The Enigma' sells for £3.1 million at auction

The Enigma: Billion-year-old black diamond sold for £3.16m

National Geographic - Little is known about the history of the gem, which just sold to a new, anonymous owner for $4.3 million. But it stands as a brilliant and ancient reminder