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

Question

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.

In: 564

Answer 1

The truth is: it’s not.

Some Stone Age peoples who had plentiful access to it used it a lot, most did not, or only found it in such small supply it was used ornamentally or ceremonially.

Just cause people do it a lot on niche YouTube hobby channels doesn’t mean that reflect real world or historic usage.