I actually did some abo heat (bag of charcoal) treating over the last several days and was going to give folks a report back. Overall I think Flint Ridge stuff needs to be REALLY hot. I did a total of 4 different batches with some change seen in some stones and no change at all in a lot of the stone. The last batch I did had probably the best results and I had too much stone for one batch so I did a double layer of stone with a lot of the stone only covered by perhaps an inch of sand. Some humps were sticking out of the sand even. I will try to get some picks up later in the week...some stone clearly has that great waxy sheen that I have seen in so many of y'alls pics. But a lot didn't change much. So a lot of it does not break cleanly still and the stone that shows a clear change in texture still won't flake well. I am guessing since virtually all of this stuff had been laying on the surface when I collected it there is a good bit of freeze/frost damage to some of it...? The stuff that doesn't break along 90 degree lines will flake a bit but the larger flakes tend to be "wavy" and dip up and down through the stone. And I can't get any flakes to drive beyond perhaps 1/2" unless I simply just shatter the stone completely. I have a lot of flakes that will make arrow points but they will be crude to say the least. They will function though.
Whoever I get in the point exchange, I hope to send you a couple crude points and some pieces of this rock I have been working with so you can wack some of it and maybe you could report back to me if my issues are more me or more the rock
I'll try to get some pics up later. Paul