Originally Posted by
Utopian
Could you please show the side of what you are calling a slurry stone? I suspect what you've got there is a two sided barber hone that has been cut into pieces.
Also, what is the large hone? If you use a different material for the rubber, then you are combining the characteristics of the two hones, and the material from the slurry stone may be more coarse than the large hone. If the slurry hone is a barber hone, then the lighter side is probably the more fine side.