"Diamonds are created from coal. The carbon in the coal is what is made into diamonds. The carbon is put under excessive pressure for a long long time, and thus diamonds are made. The only difference is time and pressure."
I think this is worthy of a sticky. I notice there's already a sticky with Clay's 1st and 2nd link so is there a possibility of combining the two posts somehow and keeping it as a 'Clay' link? I think it would be a good source of information for new blood to read. JMO