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OK gens,

have done some further testing, still on water and slurry.

Starting situation was my ERN testing razor, comming from my translucent arkansas on oil.
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The bevel and the edge...

Thanks for the hints,
I‘ve checked those resources already.
... in parallel continue searching...

The magnification of my microscope is 160x (10x of the objectiv times 16x of the eyepiece).
Thanks for the hints, will give it a try with oil or plain water.

Hey folks,

I have here a very interesting hone.
got it from UK, first it has looked black, very old and was loaded with oil.
Stone has rounded corners and rounded edges.

Once cleaned from oil...