Search:

This is a coticle....
Just hone the razor clear water ten strokes.
Strop and shave test...

If the razor was sharp enough to shave with
recently then just use it like a barber hone.

A couple...

Start with slurry and use it to the point that the edge develops.
If the edge was dull this can be quite a while. Slurry makes
the hone act coarser and faster.

Dilute the slurry when the heavy...

The shop has it inside out....

The light color site is the razor side.

The dark side will be one of two:

slate from the mine trash pile
belgium blue hone stone