Hi Stefan, how are you doing mate.

Educate me please. I am thinking my next natural stone should
be very hard, very fine. I would like the hone to feel very smooth
you know, as if you are not doing anything on it, but in the meantime
the stone is really fine polishing the metal.

I would also like the stone to be very uniform, no lines. Which type
of stone(strata) and from which mine would be the most affordable?

I have never used an asagi, but from the comments it seems one of
the best to do this job.

I have an okudo nashiji that is also very fine. Very sharp and misty/haze
finish. But you know HAD better than I do.

Sharpman