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You know, when you cut a loaf of bread you don't use much pressure on the loaf you let the knife do the work (sound familiar?). I suspect if you want a diamond hone to last you use minimal pressure...

I think folks misunderstand what hardness means Geologically speaking that is. It just means if you take a mineral with a Mohs hardness of 6 and slide it across a mineral with a Mohs hardness of 7...