Sharpening stones are available as synthetic Japanese waterstones, natural Japanese waterstones, oilstones and diamond »stones«. Furthermore, a distinction is made between the following types of sharpening stones according to their intended use.
Coarse shaping stones
Coarse-grained grinding stones for high material removal, repairs, nicks and changing the bevel angle.
Grinding stones with medium grain for sharpening dull blades.
Finely grained grinding stones for removing the burr, polishing and honing.