I'm trying to talk myself into or out of buying what I expect is Charnley but am hesitating because I've seen mention that they are rather variable in their razor finishing ability. Of course that's true of all natural stone but maybe these more than most? Do the ones that finish well tend to be the more uniform ones? Are the spots some of them have a good sign or bad (could be a feature like the maganese in coticule)? Or you basically have to roll the dice and see what you get? Here's what I'm contemplating: