User blog comment:Thedoucheinthenorth/A fault with Skyrim/@comment-4057437-20120727015514/@comment-4057437-20120729022411

Its not the hardness, its the fact that Iron has more impurities. This can make it more brittle, especially if it is cast, (overly hardened steel can also be brittle frtom too much carbon). Glass weapons did exist, (the Aztecs used weapons edged with obsidion, a volcanic glass), and while modern armor uses carbon fibers and kevlar instead of glass, glass fibers can be made into armor.

Bronze is softer and weaker than Iron, placing it in the sequence where glass is just wouldn't be right. The Hittites kicked ass because they had Iron when their enemies were still using bronze.