Fire salt is an interesting compound. It can be used to help start fires much quicker when sprinkled over a fire pit. As a mixing component, however, it has the interesting ability to attract certain components from mixtures and crystallize them. I haven't yet explored all of its uses, but there are a few recipes I've devised that rely on fire salt to work. I am pretty certain that fire salt occurs naturally, though I have yet to prove this. I have, however, found a large amount of the substance on the Vallon miners of the region.