Quote Originally Posted by onimaru55 View Post
The 20k Gokumyo is probably harder.
I haven't used a gokumyo, but biggs and owyhee jasper take the cake for me in hone hardness. They make ozuku stones look like king stones.

I haven't quite figured out how to use them in a razor rotation yet, though, they are too hard for razors and too slow, but great to chase the wire edge off of a tool.