Enigma Black Diamond: 555.55-Carat Gem Likely from Outer Space Now for Sale

The Enigma black diamond is a 555.5-carat gem, probably from space, being displayed and auctioned for the first time. Find out more about the record-breaking black space diamond!

GIA (Gemological Institute of America) on LinkedIn: The Enigma is a 555.55 carat diamond that our laboratory graded Fancy…

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