Anonymous Says:
There are other arrowheads to like obsidian if you are in volcano areas, and those are like sharp glass. There have even been quartz type arrowheads, not as sharp and heavier, but they had to use something. I'm guessing quartz arrowheads probably lasted alot long and wouldnt break, but were probably harder to make and definitely not the sharp edge you get with chert / flint.
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