Thanks to all you guys!! I am totally blown-away by your responses , advise, and info! I certainly came to the right place and I am really glad that my question has stirred up so much interest. Cheers!!!
Might be worth taking a look at some Maori tools, I saw a man in New Zealand giving a demonstration working quite hard wood with a green stone adz. The blade copied from "old" tools was polished and must have been a significant investment of time. I don't know how far back their green stone tools go but I'd guess far enough that their tool makers and yours lived very similar lives.