Dark gray in color. Stone measures 6"L x 2"W x 1"H.
The fast-cutting abrasive is harder than any natural abrasive except diamond and does an outstanding job where moderate tolerances are desired. The resulting tool edge lacks durability as compared to India. Crystolon is the choice when speed of sharpening is more important than fineness of the cutting edge.
Ideal for carbide-heavy tool steel, such as M2 or the CPMs.