The black point has very greasy looking flake scars which says to me that it is very fine grained, and possibly heat treated flint/chert. Being black, it resembles very fine grained basalt which is the favoured projectile point material from around here. But I concede to Dick's assessment and recognize that Ohio is rich in perfect raw material for this kind of work. In any case, having these two relics attached as they are to a relic of their own, is remarkable. Unique, I'd say. there's nothing new under the sun, it's said. I often attach an obsidian point to my leather arrow quivers, and carry a couple of prepared arrow shafts with my arrows when I'm hunting, in case I ever run into a situation where I have to provide for myself...so far so good.