These stones are polished in a machine until they are nice and smooth even they keep their rough form. People like very much to touch them and keep them in their pocket for luck and health. We have tumbled stones in many stones like Rockcrystal, Amethyst, Agate, Aquamarine, Aventurine, Fluorit, different kinds of Jasper, Lapis, petrified Wood, Tourmaline and much more.