Sharpening Stones: Micron & Grit

Sharpening Stones: Micron & Grit

It can be overwhelming, and slightly confusing, picking out the correct sharpening stone. We want to simplify the selection process by making it easier to understand, and identify, the differences between microns and grits. The micron of sharpening stone measures the size of abrasive grain used. The higher the micron, the coarser the stone. In contrast, a stone’s grit represents the overall coarseness of the stone. The lower the grit, the coarser the grit.

Choosing the Right Stone


Coarse stones have high microns sizes and low grits. These stones are best used for removing imperfections or smoothing out rough surfaces that are troubled with nicks, chips or other defects.

Product types: Shapton Glass Sharpening Stone, 120 Grit


Stones with a medium grit, those in the range of 1000 to about 3,000 are can be to lightly sharpen dull blades. If blades are damaged, they should always be ground down to a smooth surface with a coarse stone before being sharpened with a medium stone.  

Product types: Naniwa “Super Stone” Waterstone Hone, 1000 Grit


Finishing stones serve a double purpose; to finely sharpen and to finish blade edges. Finishing stones help bring a sharp edge to blades that makes them suitable for shaving or cutting. 

Product types: Naniwa “Super Stone” Waterstone Hone, 12000 Grit,Belgian Coticule, Shapton Glass Sharpening High-Carbon Stone, 4000 Grit


For superfine edges with a mirror-like finish, polishing stones are key. Recommended for those experienced with sharpening, polishing stones will leave edges razor sharp.

Product types:Shapton Kuromaku Professional Ceramic Whetstone Purple, 30000 Grit,Shapton Glass Sharpening Stone, 30,000 Grit

*Grits are approximate. Values based on the Shapton Glass and Ceramic Whetstone Stones.

Shop our collection of whetstone, glass, and coticule stones here.

Questions? Contact us