ET Gems: Black Diamonds Come from Outer Space Jeanna Bryner LiveScience Staff Writer LiveScience.com Mon Jan 8, 7:20 PM ET If you’re looking for a space-age way to propose marriage, a black-diamond ring might be the way to go. Long baffled by their origin, scientists now have evidence that these charcoal-colored gems formed in outer space. Stephen Haggerty and Jozsef Garai, both of Florida International University, analyzed the hydrogen in black diamond samples using infrared-detection instruments at the Brookhaven National Laboratory and found that the quantity indicated that the mineral formed in a supernova explosion. Also called carbonado diamonds, meaning...