https://en.wikipedia.org/wiki/%C3%87atalh%C3%B6y%C3%BCk
https://www.thearchaeologist.org/blog/the-worlds-oldest-mirrors-found-in-neolithic-atalhyk-site
https://en.wikipedia.org/wiki/%C3%87atalh%C3%B6y%C3%BCk
https://www.thearchaeologist.org/blog/the-worlds-oldest-mirrors-found-in-neolithic-atalhyk-site
I tried knapping obsidian and it did not go well, probably didn't help I was using a nail pounded into a wood handle. Glass is a much easier material to work with.