The sad thing is that I wouldn't consider myself anywhere near to an expert in archaeology or geology. I couldn't tell you the difference between slate and shale and I couldn't tell you the difference between a neanderthal spear point and a homo sapiens spear point... but I would never look at any of those rocks and think, "these were clearly worked by the hands of a human" let alone "these were clearly worked by the hands of a species of human that we have no evidence ever lived in North America."

Like I said in the body of the post, what the hell would you even use the one on the left for? It looks like the second you'd put any pressure on it, it would shatter.