Not likely. The earth is literaly bursting at the seams with the stuff. Coal mining is here to stay. The coal mine in Northern Alberta because of it's purity and low sulpher content is used mainly for making carbon electrodes for smelting plant furnaces and a whole lot of other carbon based products.
Yeah?
Look bud, I checked the prices before I posted.
Find charcoal at a price significantly different than $300/ton, or premium gem quality natural diamonds at a price significantly different than $6000/carat (2268 carats/pound, 2204 pounds/metric ton - do the math) and get back to me.