Tailored explosives

    I've been messing about with vanilla TNT to uncover deposits of marble in redpower, and i was wondering what you thought about the idea of explosives which destroy only a certain type of material with in a 6x6 radius? Sand, Gravel etc.

    +1 for the Idea, but it would be (maybe - a bit) useless, no ? So TNT for blocks for the tools used to mine it: Gravel, dirt and sand --> ITNT , stone/marble/basalt --> TNT + cobble (example) etc ...


    Soon with Molten Salt Reactors, right ? :D
    NERF THA FUSION REACTOR!