While searching natural stones on Google awhile ago I came across a site called. Japanese whetstone glossary. I still like to try to find and read different views and opinions about naturals. The whetstone glossary is just one part of the site. There's a menu of different topics from sealing stones, buying stones, nagura and more, It was to me some good insights by the author. And I wished that I had read something like this when first starting out on my jnat journey. I would recommend it to anyone just getting into naturals.