I was reading Ylorea's new plot whith the tower that float on the floating stone, and with her comment on the Carpenter's Ring about magic standing in for technology, I was thinking doesn't the floating stone act just the opposite of regular stone?
I mean, on the sterotypical elemental magic chart, water is opposite fire, and air is opposite earth. Since the floating rock rises into the air, could it be considered anti earth? Could there be an anti air as well, a pocket of air in the ground that won't rise, or move for that matter? What are elemental properties and what properties would thier opposites have?
Anti Fire might be cold and could even be drinkable or edible as the case may be. Anti Water should be hot, obviously, but could it also have the dancing movement of fire?
Also, munchkins will have the knee jerk reaction of turning any use of these into a Star Trek episode, and trying to combine an element and an anti element to make something blow up. Since this idea is founded on Ylorea's floating stone idea, that shouldn't be the case. Why? Well, neither source is pure and the methods for purifying them are limited to powerful elementalists or powerful elementals. Even Elemental creatures themselves aren't pure element, they have some spark of life to give them sentience.
Even uranium ore doesn't have enough purity to start a reaction on it's own, it has to be processed and purified before it can be used in a reaction like generating steam for electric turbines. The floating stone would have some anti earth in it, but no more than regular earth has pure earth elemental in it. Since neither is pure, they just exert their properties next to each other and nothing blows up.
So, how do we codify the elements we take for granted? What are thier properties and what are the opposites of those properties? And what can we do with that?