I live in western Ohio and I have only met with maybe two people he had flint (of poor quality) and one gut with a good size piece of obsidian but other than that I've had no luck finding any material other than beer bottles. I've had good luck with bottle bottoms and I've made probably around ten to twelve points but they just don'e have the WOW factor as does a flint or obsidian. I wish I could figure out how to post pics so I can show my work.