Natural whetstone. The "Genuine Belgium whetstone". Use with water. Sharpening, rectifying and polishing all kind of knives and scissors.
Yellow surface: grit 7000, faster than BBW blue whetstone cause greater concentration of garnets, wich are responsible for roughing the steel. Blue surface: slate as stand, which allows to finish sharpening better if necessary.
The Ardennes Cotícula Selecta whetstone is the most complete of its range, cause allows to sharpen all kind of pieces thanks to 2 features, greater hardness and concentration of garnets and very fine surface (6000-8000 grit). The manufacturer recommends use with water better than oil cause garnets flow better in water and maintains its properties of sharpening for many years