I now own the infamous "rock with a hole in it" that my buddy had on his dresser for years. He said it was his grandfathers who found it "somewhere I dunno". Indian?
Man, I'm just not sure about that piece. The hole in the 2nd picture shows signs of it being drilled, but I have no clue what that piece may have been. Just not sure on that one.
If the hole is uneven and not straight through then I doubt it was drilled which would make it a naturally occuring hole. That would mean it was probably a softer material in there at one time that has just eroded out and would mean that it probably isn't an artifact at all, just a geofact.