Thread: Coticule - Diamond plate

I just flattened my La Grise with a diamond plate because it was way out of whack.

I then honed on it and disliked my shave, which is very atypical.

Then I read this:

A diamond plate on a coticule will cleave the garnets. Leaving jagged edges which defeats the whole purpose of using a coticule. It is the natural shape of these garnets that give that characteristic coti edge. Some do it though and say it is fine, but not so much under a microscope. Coticule will usually be much faster after lapping till they settle down.

What do we think of this, and if so how do we "fix" this?

Do I burnish them? hone some razors on it dry, use my slurry stone wet/dry? Rub some Coticules against one another?

As I also found this:

A Coticule contains garnets for abrasive medium. When we moist the Coticule's surface and rub it with another piece of Coticule, garnets are released into the water.

Any input is greatly welcome,


In the old video (1970s) I posted about the Coticule, the people used to take GREAT care to finish the stone right, I'm sure they were very knowledgeable about the why they had to do this after the stones were sawn.