Coarse or Fine? How to Spot the Difference on Your Sharpening Stone

Coarse or Fine? How to Spot the Difference on Your Sharpening Stone


The world of knives is expansive and intricate, encompassing everything from the artistry of knife-making to the precision of knife-sharpening. Within this sphere, the sharpening stone plays a significant role. When it comes to these stones, a common question arises, "Which side of a sharpening stone is coarse?" The answer is more complex than it seems, as the coarse side is not uniformly designated. Let's delve into this topic, and explore how you can identify and effectively use the coarse side of your sharpening stone.

Understanding Sharpening Stones: Single-Grit vs. Combination

Sharpening stones, also known as whetstones, can be divided into two primary categories: single-grit stones and combination stones.

Single-grit stones have the same grit (the measure of coarseness or fineness of the stone) on both sides. In this case, there's no need to distinguish between sides, as they both provide the same sharpening capability.

On the other hand, combination stones have two sides with different grits: one coarse and one fine. The coarse side is typically used to repair chips or dull blades, while the fine side is used to refine and polish the edge for precise, clean cuts. For these stones, identifying the coarse side is critical.

Identifying the Coarse Side: The Grit Tells the Story

The first step in identifying the coarse side of a combination stone is understanding grit numbers. Sharpening stones come in various grits, with lower numbers indicating a coarse grit and higher numbers indicating a fine grit.

For example, a stone might be marked as '1000/6000.' This means one side of the stone is 1000 grit (the coarse side) and the other is 6000 grit (the fine side). The grit number is usually marked on the side or the box of the stone. If it's not, or the marking has worn off, you may need to determine the grit by feel.

The coarse side of the stone will feel rough to the touch, like low-grit sandpaper. The fine side, in contrast, will feel smoother. Be careful when handling the stone to avoid damaging the surface or hurting your fingers.

Using the Coarse Side Effectively

Knowing which side of your stone is coarse is one thing; using it correctly is another. The coarse side of your sharpening stone is designed for heavy-duty sharpening — perfect for blades that are significantly dull or have small chips.

When using the coarse side, apply moderate pressure in a consistent motion along the edge of the blade. The goal is to remove enough material to reshape or refresh the edge without taking off excessive amounts. After using the coarse side, you should notice a burr (a tiny ridge of metal) on the edge of the blade. This signifies that enough metal has been removed.

After the coarse side has done its job, it's time to switch to the fine side of your sharpening stone. The fine side smooths out the burr and polishes the blade, refining the edge for clean, precise cuts.

Maintaining Your Sharpening Stone

Proper maintenance is essential to keep your sharpening stone effective. After each use, the stone should be cleaned to remove any metal filings or debris. Warm water and a soft brush should do the trick, but avoid using soap as it can clog the stone's pores. Also, regularly flattening your stone ensures an even surface for consistent sharpening.


Identifying and effectively using the coarse side of your sharpening stone is fundamental to the knife-sharpening process. It's this side of the stone that takes on the heavy lifting when it comes to restoring dull or slightly damaged blades. The rule of thumb is simple: lower grit numbers (and a rougher feel) indicate the coarse side, while higher numbers (and a smoother feel) point to the fine side.

But remember, sharpening a knife is as much an art as it is a science. It requires patience, practice, and care. As you become more familiar with your sharpening stone and knives, you'll be able to sharpen by feel and sound, in addition to grit numbers.

So, the next time you pick up your combination sharpening stone, you'll know exactly which side to turn to. With this understanding, you can keep your blades sharp, safe, and ready for whatever culinary adventure awaits.

Leave a comment

Please note, comments must be approved before they are published