Quote Originally Posted by Hirlau View Post
5 hours of lapping a ceramic tile = No wife or girlfriend,,,,,
Quote Originally Posted by Substance View Post
it looks like an Aluminium Oxide tile, very wear resistant & hard as & can polish up with very little wear in Coal & Bauxite chutes over time

I keep one I got new from a job I was on many years ago about 6"x4"x1/2" in my tackle box for my sharpening my fishing knife & hooks
I don't think the grains are as uniformly sized either as a true hone.
I personally would not use it on my blades but I have not lapped it either, I bet that is a chore as they are made not to wear out

I also have a large 12"x8"x1" tile i have used to bring a dead axe back to life before the Norton 220/360 that looks like a very coarse carbodium but much lower grit than my Norton 220
After I get it lapped I will try it on a GD razor, and I will use my microscope to check the edge. I just thought I would give it a try. You never know