Are the diamond's days as an indestructible substance numbered? Possibly. At about 170,000 atmospheres, scientists managed to use super-hard graphite to crack one in 2003, but the exact reason why was somewhat of a mystery. Now maybe it's not.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/2ci7Q8GsksE/diamond+busting-super+hard-graphite-squeezed-toward-reality
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