Tumbled stones are effective as raw crystals. The energy in the stones will not disappear when they are polished. Furthermore, the shapes of tumbled stones are more convenient for us to use on our daliy life. We can put them in our pockets for good lucks. We can also use them as healing stone or chakra stone to do some healing exercises. The advantage of tumbled stones than raw crystals is that they are more convenient for our daily usage.