Talis

Talis is a glass like material that was originally found on Nobo, Aojeeria's small moon.

Though this wasn't the first material used for glass, it definitely stayed at the material much after it was discovered how much more clear it was and how hard it was to break. This ended up being used for bullet proof windows, generally adding to the security of Aojeeria's city, even Crumbled Sanity decided that this was so good that he used it more for decorating rather than actual protection.