I've heard you don't have to / not supposed to sharpen ceramic blades.
I've got some ceramic kitchen knives, but upon doing some research, if they were made in China, they're the same material. They're not purely ceramic - they have traces of metal mixed in for security reasons (apparently some international law or something, to prevent them from being taken aboard planes). I really like mine, but as an EDC folder, you absolutely don't want to do any sort of prying, not even to, say, remove an avocado pit (you know, how you kinda smack the blade into it, and twist side to side?yeah, don't do that.)