FEW WORDS
The Official Naming Of The Product Is Sharpening Stone but it is known also as < > or < >.It is a natural , non metallic mining constituted at 96-99% from Dioxide of Silicon (SiO2) that it is found in micro-crystal form in the Mountains Of Elouda. It is only met there with the form of layers of sediment material that is to say constituted from skeletons (basically marine) micro-organisms. From these parallel layers of the water stone that is usually from completely white up to open grey colour excavates and then produced the known abrasive material, the whetstone.