Board Thread:Off Topic/@comment-38854975-20190905144044/@comment-25396609-20191011192038

The Macuahuitl is kind of genius in general, really. Volcanic glass is a readily available resource in the region and requires less effort to make weapons out of then metal; on top of being razor fucking sharp.

Using small, less fragile (as the small pieces are under less weight-based mechanical stress) fragments which are easily replaced (and can even break off and embed in the wound delivered, causing internal damage and making it harder to deal with after the fight) almost completely negates the downsides of using it as a material.