Why is obsidian used for so many weapons even though it is very fragile?

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I’ve been coming across videos of people breaking obsidian chunks to make arrowheads but could never find the answer why it could be broken with light hits with a rock, and then not break when in use with said weapon.

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Anonymous 0 Comments

Because it can be made very sharp and very easily. It’s a trade-off. I bet I could make a sharper knife with obsidian than you could by sharpening a dull knife. It doesn’t last long, but for an arrowhead or a single opponent, it doesn’t have to. It just needs to get the job done. If you need something that last longer and you don’t have access to metal, you use stone, which isn’t nearly as good.

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