Whetstone Belgian chunks, natural stone blue, 15 x 4cm, grain 5000er

The mining of the Belgian Brocken was mentioned for the first time in 1625 in writing. But already Pliny (23-79 AD Roman scholar) mentions special grindstones from the Ardennes in his writings. In the approximately 480 million old slate sedimentary rocks of volcanic ash and clays are embedded in veins of 5-20 cm finest grenade (5-20 microns). The blue Belgian Brocken contains about 30% stored grenades and has a grain size of 5000-6000 and is very easy to use. Applied with water, it nourishes and sharpens the tips of knives and tools without leaving a burr. Natural stone approx. 150 x 40 x 14mm bank stone size: 5000-6000