I just sent you a PM with some bad info. This is banded rhyolite I do think. I told you rhyolite is green, but I'm wrong. Green banded slate is not rare where we are. I have found a few blades and points of this lithic and blanks, like you have. This is the lithic that banner stones and rare ornamental pieces will be made of.
The chunk and the blade were found in the same field as your pieces. If not the exact field, just over the bridge. Nice to have a local to talk to. I was alone for a good while here on T-net! Lol!