cheap Ceramic folders

[PTRSAK]

Bought a couple of these off eBay, crap handle but the blade is pretty nice. Shaving sharp and likely to stay that way unless I abuse it.
Planning to pull one apart and make up a nicer handle, something like an Opinel garden knife.

You can't really go wrong at 2 for $13.50 incl post

[Chako]

I bought a set of kitchen knives with similar blades. I made the mistake of looking at it askew one fine morning, and the blade broke. Seriously, and I had never abused them...it just took a light tap at the wrong angle and a broken blade. I hope you have better luck with these.

[PTRSAK]

I do realise they can be fragile. I have a ceramic blade paring knife in my kitchen drawer and it came with a list of "DON'T DO"s. like cutting frozen foods, twisting or prying, using as a chopper or icepick, hitting with anything etc etc.

[Etherealicer]

I did a small test on a Semptec Ceramic Knive. Meanwhile ,I have used it to cut open a beer bottle (used it to cut through the neck, just because), so the blade is ruined
I also own a ceramic kitchen knife. I do most of those things with my kitchen knife PTRSAK mentions as No Go (no, I never read instructions). As long as you don't hit a metal edge your fine (I once slammed my previous ceramic kitchen knife on a frying pan, it chipped quite badly). Its now more than a year in my possession and still as fresh as a daisy. So I would say ceramic knives are far more durable than they are given credit. Probably because there are too many products out there of minor quality.

Also when using a ceramic knife I feel like a Fremen Warrior

[Philthy]

I did a small test on a Semptec Ceramic Knive. Meanwhile ,I have used it to cut open a beer bottle (used it to cut through the neck, just because), so the blade is ruined
...

Do you mean you whacked the blade against the lip so the glass broke at the neck?  I'm not sure I understand what you're saying.

[jzmtl]

Don't ever try to make them sharper (unless you are kwakster with all those fancy sharpening stuff).

I bought one of those boker ceramic folders, it would cut but wasn't particularly sharp. I tried to sharpen it with diamond stone, BIG MISTAKE, now I have a rust proof titanium handled folding butter knife. 

[Etherealicer]

I did a small test on a Semptec Ceramic Knive. Meanwhile ,I have used it to cut open a beer bottle (used it to cut through the neck, just because), so the blade is ruined
...

Do you mean you whacked the blade against the lip so the glass broke at the neck?  I'm not sure I understand what you're saying.

Nope, I used the edge to cut through the class with sawing motion. It works though the blade looks rough (I will try to make a picture tonight).

[Etherealicer]

I did a small test on a Semptec Ceramic Knive. Meanwhile ,I have used it to cut open a beer bottle (used it to cut through the neck, just because), so the blade is ruined
...

Do you mean you whacked the blade against the lip so the glass broke at the neck?  I'm not sure I understand what you're saying.

Nope, I used the edge to cut through the glass with sawing motion. It works though the blade looks rough (I will try to make a picture tonight).

So here is the picture