This natural sharpening stone produces microscopic grains.The passage of a razor edge over the wet stone frees the garnets from the surface.

These together with the water form an abrasive paste so fine that they give the edge a shiny (flawless) appearance. In addition, the fineness as well as the speed of the sharpening are not negligible assets.It is for these reasons that these stones are so sought after.
It is the only natural stone capable of sharpening all steels, even stainless steel.