I was not being sarcastic. I was being dead serious. We have many "experts" on this forum when it comes to Japanese Stones. I know squat about them but I do know a thing or two about Geology and I do know that in Japan there are people who collect and study them and have been doing that all their lives. They specialize on various locals and it is a lifelong endeavor.
Most who think they know study a bit and do some reading and think they have it down but really are clueless but will never realize it.
It not just a matter of knowing the names of the stones and what they do but being able to recognize them in all their grades and variations and I don't mean every hone just the one or two you might be interested in.
Just my 2 cents for those who want to avoid being fleeced.