Nice finds there ! For the grey one on the left. it is hard to tell from this angle if the base is still all there, or if there is any missing? From what I can see I would just call it a large constricting stem point, and it does look to be rhyolite material. The mottled looking point next to it looks to be made from some unusual material, or has some unusual patina, or both. With the wide square stemmed base, and pointy shoulder, I would think it is most likely a Kirk stemmed variety, maybe not wide enough or having sides that are convex enough to be in the Savannah River type? I like the jasper point next to the 3 ringer the best. Even though the base is gone, which is common on that type, I think it is a Kirk Corner notched point, and probably of the Charleston variety with those incurvate sides. I would guess that the two points in the first photo probably date to around 4000-6000 BC, and the jasper point to around 6000-8000 BC.
I would go looking for arrowheads around that spot any chance I got. HH