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.

A Look At JB Champion's Unique Observatory Chronometer Wristwatch: The OTHER Patek With A Chance To Become The Most Expensive Watch In The World - Hodinkee

92-Carat Heart-Shaped Diamond Sets Auction Record

Billion-Year-Old Black Diamond 'The Enigma' Sells For More Than £3 Million

World's biggest black diamond sold for $4.2M in London

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

Brian Joseph Jewelry (@brianjoseph929) / X

The Enigma Is The Largest Fancy Black Natural Diamond In The World

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

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