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

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

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

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

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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

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

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Louis Vuitton just bought the world's second-biggest diamond

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

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