How to sharpen ceramic knives?


” Of course, ceramic knives get dull over time and need to be sharpened”

I have bought a ceramic knife. I‘ve used it on daily basis and was happy until the day when I realised that the blade is already not so sharp as before. When I looked carefulIy on the knife, I saw some little chips on it:

sharpen ceramic knives

I started to think – is there some possibility of sharpening my ceramic knife or should I buy new one?

To  buy new ceramic knife due to loss of sharpness, it’s not the best idea.

To sharpen ceramic knives you can also either use the  professional sharpening servise- but there is time and money factor. Or to send this knife to the manufacturer for sharpening it . Actually – it’s also not for free. At least you need to pay the shipping fees and wait in some cases several weeks until your sharpened knife will return back.

I started to think about the cheapest and fastest way how to sharpen ceramic  knives by myself.

From the experiences with the stainless steel knives I know,  it’s not easy at all to sharpen the knives manually. At least you need sharpening tools to do that. Especially for to sharpen ceramic knives you need diamond sharpening stones or diamond sharpening rod.

sharpen ceramic knives
Manual sharpening  is a quite big challenge also for skilled persons (also for me). First you need decide which from these tools is the best for your knife,  you need to know what pressure to use and under what angle to sharpen the knife.  Also the skill, patience and firm hands are important. With some wrong  strokes you can destroy the knife even more.

I would say manual sharpening  is like a grinding college. Good just for people who have time or need some kind of meditation:)


” Ceramic is the second hardest material, but very fragile….”

The manual sharpening could be problem in regard to the material the ceramic knives are made of. Ceramic knives have blades made of  high-tech ceramic (also known as zirconia), what is the second hardest material , right after diamond. On Mohs scale of minerall hardness – ceramic has hardness of 8.5 (diamond of 10, steel of 8). So these knives can be sharpened just against something that is harder that ceramic is.

So if you make some mistake when sharpening with these diamond tools, much more damage could raise on knife then by manual sharpening the steel knife. Some other additional stroke and you can easily get unwanted  chips on your knife.


I personally prefer other alternative of how to sharpen ceramic knives – the diamond sharpener. You can choose either between handheld/manual knife sharpener:

sharpen ceramic knives

  • the sharpening is performed with manual pulling the knife towards to you
  • the biggest advantage of this kind of sharpener is – portable, simple design, and affordable price
  • but -with incorrect technique of  sharpening with this sharpener you can cause more harm then good.

Here I made TESTING of one universal kitchen version of manual sharpener

Or  you could choose the electric knife sharpener – the sharpener with battery or electric power. I personally prefer this one. It‘s the easiest way of sharpening your ceramic knife. It’s not just for professionals, but for all people who wants to get perfect sharp edges for their knifes  just in few seconds.

sharpen ceramic knives

On the market, there are many ceramic knife sharpeners. The usability of sharpener determines mainly design of sharpener.

TOP 5 Ceramic knives sharpener REVIEW


When starting to think, which concrete ceramic sharpener to choose, there are several factors that you need to take into consideration.

  • Ceramic knives could have various lenghts and shapes .
  • Some sharpeners are suitable just for kitchen knives, some also for other purposes (hunting etc.).
  •  If the blade is short and the knife has protection against finger cut. There is need to think about sharpener where we do not insert the blade into it. We’ll be not able to sharpen the blade in full lenght:        


  • If you have serrated ceramic knife (for example for bread), you can’t sharpen it with normal sharpener. Sharpening is possible with just manually with diamond sharpening rod or with special sharpener with function for it.


  •   With the sharpeners, in that is possible to insert the blade, you need to pay attention on the cutting angle. In general, the larger the cutting angle is, the more resistent it’s against dulling.


When sharpening your ceramic knife, you need carefully read the instructions in the sharpener guide attached with the product.


When you finished the sharpening work you can make a test. For testing if the blade is sharp enough you can use the paper. Take a paper and try to cut it with the knife. If the cut goes easily and smoothly, the knife is sharpened enough. If the knife tears paper in the cut, you must continue in knife grinding.