A red and green rock stuffed with 30,000 teeny-tiny diamonds was pulled from Russia's huge Udachnaya diamond mine and donated to science (the diamonds' tiny size means they're worthless as gems).
It was a lucky break for researchers, because the diamond-rich rock is a rare find in many ways. The concentration of diamonds in the rock is millions of times greater than that in typical diamond ore, which averages 1 to 6 carats per ton.
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