I don't follow that sort of thing, but I've heard there are a LOT of modern fakes around now. I went to a Pioneer Days thingie here a couple years ago. It's a big annual get-together where everyone wears period clothes and sets up a big camp for a few days mimicking the old days of the pioneers. It's pretty interesting. I also remember a guy there who had a big pile of flint and he'd do nothing but sit there making arrowheads by hand. Maybe the experts can tell the difference, but to my inexperienced eye, they looked persactly like the stuff I used to pick up in the corn and tobacco fields in N.C.