The tool on the right looks like a nice high grade flint or jasper not sure on the left one but both look to be worked. I usually just put those types in my mystery tub. Hard to say if they were actually used and if they were used what would it of been used for? If I had found them I would keep them to.
Great looking artifacts. It looks similar to this material found in Middle Tn along the Duck River.the picture does not show the true color but it looks close?