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.

Black diamond so rare it holds a world record can be had with crypto

Over 300-Carat Yellow Diamond to Be Auctioned Without Reserve

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

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

Billion-Year-Old Black Diamond Sells for $4.3 Million - WSJ

Brian Joseph Jewelry (@brianjoseph929) / X

The Largest Diamonds in the World (and Who Owns Them in 2024) –

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

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

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