Quote Originally Posted by Bill S View Post
I was under the impression that the Belgian Blue and the Coticule differed in the concentration of the garnets rather than their shape. Don't the garnets change shape as they are cleaved during honing?
I don't believe we can cleave the micro-crystalline garnets while honing.

And you are right the Yellow Coticule has 35% - 43% garnets,
the Belgian Blue has 30 % garnets.

But the important difference is garnets shape:
Yellow Coticule is more abrasive, it’s a better sharpening stone...
the Belgian Blue more a polishing stone.