Formed over 400 million years ago in the ancient seas that shaped the Ouachita Mountains, Arkansas novaculite is recognized around the world for one thing: producing an exceptional edge. Each tri-hone set includes three stones and honing oil, giving you a complete progression for restoring and refining your blades. Novaculite is a dense, microcrystalline quartz found almost exclusively in Arkansas. Its tightly bonded silica structure allows it to cut steel cleanly and evenly — which is why Arkansas stones have been trusted by craftsmen, hunters, and chefs for generations. This set includes: Coarse Stone (Silica Carbide) – For repairing blades that are particularly dull or nicked Medium (Soft Arkansas Novaculite) – A versatile, general-purpose stone that develops a clean working edge Fine (Hard Arkansas Novaculite) – For refining and polishing your blade toward razor sharpness Used with honing oil, these stones provide a smooth, controlled sharpening experience that improves with time and proper care.