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

Obsidian is a type of glass. It can break with light hits because you’re hitting glass with a rock. Then you put it on an arrowhead because broken glass is sharp, and after you’ve shot someone with it, you don’t really care if you’ll get a chance to use that arrow again.

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