Afgan deposits may be substantial, but they are located in some of the most dangerous locations. Afganistan does not have a central government, they do not have roads, they do not have electrical generation, they don't even have fuel depots except for the U.S. military. If a company does want to risk all to develope this part of the world, they must first hire their own private army and must be willing to wage war. Obviously, even the United States can't do this in a cost effective manner.
Kgem