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.

The Enigma.': Giant 555.55-carat black diamond heads to auction

$4.3 Million Diamond-Encrusted High Heels on Offer in Shanghai - Bloomberg

Rare diamond, blasted from outer space, could fetch $6.8M

This $30 Million White Diamond Is The Largest To Ever Appear At Auction

THE PLAYLIST: AFRICA'S TOP 20 MUSICIANS - Forbes Africa

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

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

Black Diamond: A Mystery of the French Countryside: 9780307744630: Walker, Martin: Books

The Second-Biggest Diamond in History Has a New Owner - The New York Times

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

The Enigma: Mysterious black diamond up for auction - BBC News

This $30 Million White Diamond Is The Largest To Ever Appear At Auction