Generally clays. Perhaps you've seen some makeup bottles labeled with something like "kaolin". "kaolin" is referring to kaolinite clay. I've also heard of montmorrilonite clays being used in makeup,...
Some very good olivine samples can be used as a gemstone (they are called peridot, then, after the french word for olivine). Olivine also reacts with CO2, and because of this, it can be used to...