Finishing
There are 9 standard surface finishes (see examples below) we can apply the stones. From very common polished to less known frosted.
To be polished, the stone must be sufficiently compact and include a sufficient number of minerals "hard".
Granite and marble are often polished, on the other hand basalt and slate, are less often polished. Rough polishing can give a more aesthetic value or even be necessary. But often lose their marbles living character when we use the rough finish.