Well, at the end of the day results are more important than using a stone 'as recommended.' Such is my humble opinion. I've mentioned a few times that I use mine with oil. This seems to be sacrilege to some coticule users, but I've tried every water & shave lather method known to man it simply doesn't work. Almost makes me wonder what it would produce dry, but as they say - if it ain't broke, don't fix it.

This is the first I've seen mention of them being used that way. Sounds like you got the perfect hard little stone for the purpose.