As I posted a few days ago, I got some rhyolite. The thing about rhyolite is that the primo stuff is hard to come by and because of my inexperience at collecting rock, I ended up with some rock that was ok and a little that was really nice. I'm not good at knapping yet so I'm using the ok stuff and saving the good stuff for when I'm better. The problem I'm finding with the medium quality rhyolite is that it likes flaking across one way better than across the other way. This means that you have to plan your point a little more than with other rock types. The primo stuff almost behaves like chert . Can anyone else out there post their tips or experiences with rhyolite.