Flint is a natural mineral. It can be encountered in various places. In some areas there can be lots of it, but in others there can be none at all. Usually it is gathered along riverbanks. In nature, flint tends to appear as smooth, round, fist-sized boulders. You'll have to split such rocks in order to get the small, sharp pieces you need. You ought to be careful and wear gloves and protective goggles to split flint. There are many types of flint and it can be green, gray, black or brown in color. One distinctive feature of this mineral is that has very sharp edges and it is these edges that allow us to use it to remove slivers of metal from a firesteel.