Yes it will work on all hard stones, but on Jnats for instance, the use of a nagura stone makes using a chisel redundant. Most Jnats will self-slurry if you try to chisel-burnish them anyway. It can be a useful technique but is best for very hard stones that do not shed much grit. It works well for the Cnat or PHIG from the feedback I got from a guy who I recommended to try it, probably wouldn't be much use on a coticule.