How does Shapton GlassStone media differ from traditional man-made waterstones?
Shapton uses a finely graded ceramic media which is very hard and sharp. This results in waterstones which wear slowly and do not need pre-soaking. Another characteristic of the GlassStone series is the ability of the stone to both cut and polish at the same time. While this may sound counterintuitive, some of the ceramic particles are worn smooth while others more recently revealed are sharp. This nets out to a more polished finish with less work as you progress to finer grits.