It is the best natural stone in the world, The traditional yellow Coticule is of breathtaking finesse and finish. The yellow slate vein contains approximately 35-40% finest garnets with a grain size of 8,000-10,000 grains, which results into the stone being very fast at whetting knives and all your cutting tools.
The YELLOW Coticule consists of a Coticule top side of 7 to 10 mm and a bottom side of unusable black shist.
A great review made by a customer :