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.

Over 300-Carat Yellow Diamond to Be Auctioned Without Reserve

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

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

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

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

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

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

How Much is a Yellow Diamond Worth - Learn about Prices & More

Enigma Black Diamond Sells For $4.3 Million At Auction

Huge Black Diamond Sold for $4.3 Million–and No One Knows Where it Came From or How it Was Formed

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