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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Related note – I used to think obsidian was rare, until I visited this massive obsidian floe in Oregon, now it makes sense why it was so widely used: [https://imgur.com/a/yoytZrh](https://imgur.com/a/yoytZrh)
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