you can always go to a gem store, I know at mine they carry full stones including flint and jasper, and you can get obsidian for 1$ a pound, plus you can buy precut slabs or have it cut, which is nice with the pricey stone, at least that's a good way to get started and they can probablly let you know about some local knappers, the fellow that owns my local store happens to be a knapper so he is alot of help, Bub