How to Sharpen Ceramic Knives

A common misconception is that the blades of ceramic knives don’t get dull. While this would be a dream come true for anyone, unfortunately, it’s not true. In reality, their blades do get dull, the difference between them and other types of knives being that ceramic cutlery pieces get dull after a longer period of time. While it’s not as easy to sharpen ceramic knives as it is with stainless steel knives, it’s not impossible either. As a matter of fact, you can do it using different methods, so you have freedom of choice when it comes to this procedure. If you own ceramic knives and you want to be properly prepared when the time comes to sharpen their blades, read the rest of the article to learn what steps you must take in order to make them razor sharp again.

Method #1: Using Diamond Stones

This is the classic method of sharpening a ceramic knife, and it’s one that will give you a lot of satisfaction if you’re the DIY type of person. Although you could use sandpaper for the task, diamond stores are clearly the smarter choice to go with due to their quality.

What you need:

  • 200 grit diamond stone
  • 600 grit diamond stone
  • 1000 grit diamond stone
  • 1500 grit diamond stone


It just doesn’t get easier than any easier than this sharpening method, all that you have to do being to pass each side of the knife’s blade over the stone. In case there are large chips in the blade, you must first sharpen it with the 200 grit diamond stone. This is a step that you can skip if the damage or dullness isn’t that harsh. Afterward, move on to sharpening the blade with the 600 stone, the 1000 stone, and the 1500 stone. Rubbing the blade against all four different grit diamond stones will make it razor sharp, just as it was when you first bought it.

Method #2: Using an Electric Knife Sharpener

If you fancy yourself to be a modern type of person who enjoys speed and accuracy in everything you do, then this is definitely the method that you must go with. Just be aware of the fact that not all electric knife sharpeners are compatible with ceramic knives, so watch out that you purchase the right model. A great example of such a sharpener is the Shenzhen Knives SZSHARP electric diamond knife sharpener that works for both ceramic and stainless steel knives.


Here are the seven steps that you must go through when sharpening ceramic cutlery with the help of an electric knife sharpener:
Step #1 – Clean the blade
Obviously, you have to start with cleaning the ceramic knife. This way, no food residue will be left on the blade and it will be sharpened to perfection.
Step #2 – Position the sharpener
Now, take your electric knife sharpener out and place it on a flat surface, like the counter or a table. Also, make sure that the surface is steady to avoid any unpleasant incidents.
Step #3 – First sharpening stage
Now you can move on to positioning the blade in the sharpener. If you use the knife sharpener that we recommended, place the knife in the slot afferent to the first sharpening stage, and ensure that it makes contact with the stone before you start the operation. After the blade is positioned perfectly, just press the red button to turn on the sharpener and slide the blade gently through the slot. Do this for both sides of the blade. When you’re done, press the red button to shut off the device.
Step #4 – Second sharpening stage
In the second sharpening stage, you simply repeat what you did in the previous step. Of course, when you’re done with this step, you must turn the sharpener off by pressing the red button.
Step #5 – Repeat the last two steps
Now, all that you must do is to repeat the previous two steps 4-5 times to make sure that the blade is sharpened as well as possible.
Step #6 – Testing the knife
Of course, you must test the knife’s sharpness. We recommend that you cut a tomato or a sheet of paper with the knife to check the sharpness of the blade. If it cuts the tomato without crushing it or the paper without tearing pieces off, it means that you’re done. In case you’re not satisfied with the sharpness of the blade, repeat the entire process starting with the first step.
Step #7 – Clean the knife
When the process is finally over and the blade is sharp enough to perfectly cut through anything you want, don’t forget to clean the knife. This way, you ensure that no ceramic dust will lay on the blade, dust that might contaminate the food items that you cut, chop, slice, mince, or dice with the knife.

Our Recommendation

We must start off by telling you that this in only a recommendation, not an advice that you must find mandatory as your personal opinion and preference is what matters most when taking any type of decision. Now, moving on to our point of view, after years of a first-hand experience with these knives, we recommend that you choose an electric knife sharpener for the task of restoring their blade sharpness.

This might not be a popular opinion among those of you who like to take matters into their own hands, but the truth of the matter is that electric knife sharpeners provide a faster and easier sharpening of ceramic knives. Undoubtedly, it is safer to sharpen a ceramic knife manually, but if you make sure to invest in a quality sharpener, you shouldn’t have an issue when you rely on an electric sharpener for the task either.


  1. Kurt says:

    I have to admit that it sounds a lot easier to use an electric sharpener, but I’m too accustomed to using diamond stones. It doesn’t take such a long time, and I have a full control over the sharpening process, so I will probably stick to this method.

  2. Linda Carter says:

    Thank you for the useful article. Indeed, it’s more convenient to sharpen the dull ceramic knife with the electric sharpener. This is the option that I’ll go with as well.