If you have ever ventured into the vast world of crystals, you must have found that there are various types of crystals, each having a different property as well as a different purpose. Rough Stones are stones or crystals that are raw, rough, and straight from the depths of the Earth. Basically, if someone says that a crystal is rough, he means that the stone has not been altered or polished in any shape or form. Tumbled stones go through a special process in which they are smoothened out. In this process, the stones are processed using rock tumblers where water, grit, and polish are used.