Diamonds and coal

Posted on May 10, 2010

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From http://www.newton.dep.anl.gov/askasci/env99/env171.htm

"Diamonds are not likely to be found with coal (although it
is theoretically possible), because diamonds are created
from virtually pure graphite (carbon) and tremendous pressure.
Coal has significant impurities (having resulted from
decayed organic material it is not pure carbon) and
normally resulted from less pressure."
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