Well my younger brother (maddog314 on this forum) gave me two (yes just two!!!) flakes of some obsidian, so last night while I was heat treating a bow I decided to get it out and see what i could do with it. Cahokias are probably my all time favorite point and since I had never tried one I thought I might with this. It snapped the tip as I was trying to thin it more so it came in a little short. I also don't have anything good yet for narrow notching so they are a bit wide.
I love working with this stuff! sure beats glass and porcelain floor tiles.