The world's largest diamond, the Cullinan, is a tad over 3,100 carats uncut. It's 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...via Engadget RSS Feed http://www.engadget.com/2014/06/26/earth-sized-diamond/?ncid=rss_truncated
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