Originally Posted by
Voidmonster
Also, a warning to folks.
These stones vary in quality quite a lot and it's very difficult to tell by looking at it if you've got a good one.
I've got two of them, one from the Polish eBay seller linked upthread, and one from Woodcraft.
First of all, there really should not be a grit rating associated with these. They're natural stones.
That said, the larger one I got from Woodcraft is a step backward from a Norton 8k.
The one from Razors_Pl is wonderful, though. A very perceptible improvement over the Norton.
These days, I use the Woodcraft-sourced one as a plate for lapping film and also for flattening horn, but never for honing.