Index of tropes about various metals and minerals.
Rolling Updates Will be a sub index of The Ground Beneath Our Feet.
Just as the various things found in dirt and rocks have shaped the real world, they have also shaped fiction. These are tropes about them. Note that it is not enough to just have the name of a metal or mineral. If it has the word "iron" it better involve actual iron, and if it has "salt" in the title, it better involve salt in some way.'