User blog comment:DogDays124/New Test/@comment-3242362-20101228033441

Kimberlite is formed through the cooling of magma, and marble is formed through either sedimentary or igneous rock being put under enough pressure to form new rock. Coal, meanwhile, comes from sediments being pushed together and put under enough pressure that they come together to form rocks, coal, in this case. Coal is currently worth $71.15 in Central Appalachia, Cantuar Kimberlite was worth between $278 and $582 per carat in 2008, and the current cost of marble flooring ranges between $9-$20 per square foot (not including installation).