Quote Originally Posted by holli4pirating View Post
They vary, being naturals. The blue is typically "lower grit," but may also have a slower cutting speed. You'd have to play with your coticule (yellow side) and blue with slurry on each to see what their speeds and finishes are like. If you search on the forum, they are referred to as Belgian Blue Waterstones, or BBW for short.
I fully understand how naturals vary even rocks cut side by side.

Perhaps I didn't word my question properly however you have touched on what I was wondering about :. Has anyone used the 'Blue' side for setting a bevel? Or any other kind of non finishing razor work?