Check the listing for details. Ardennes Coticule Coticule Belgian Blue Sharpening Tools Whetstone Med - 606. Color: Silver, Condition: New, Made in Belgium. Listed at 53.15 USD. Mined directly from the Ardennes region of Belgium, this hone stone is renowned for its unique abrasive qualities, producing keen, lasting sharpness on knives and tools. 100% handmade in Belgium. Color: Silver.