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you are getting confused yourself.Don't pay attention to colors.100% this stone is natural combo stone .Possible you have get better stone then usual people gets.No one knows untill you will test it...

I think you will find out when you test it.Try it in almost shave ready blade and check the edge after 10-20 passes.Check the edge if it is brakes then not good coticule ,not brakes smooths edge then...