Astronomers discover Earth-sized ‘diamond’ 900 light years away

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The world’s largest diamond, the Cullinan, is a tad over 3,100 carats uncut. Its estimated value is some $2 billion, and it only weighs about 1.37 pounds. That stone, while enormous relative to others like it, is but an invisible speck when up…

This post has already been read 67 times!