User blog comment:Withersoul/How would man have fought against the grim before using dust?/@comment-10390252-20130902144144/@comment-23784953-20130902160725

@Sorairo

To put in perspective. The right sides are weapons that look metallic enough. The left ones are the not-quite metallic weapons. I'm specifically talking about the aspect of their weapons, not just the blades, because it'll obviously be made from metal.

These are all my assumptions only though. The metallic weapons (not counting Jaune's sword, but it's obvious metal) have a bit of a shine in them while the almost-non-metallic weapons don't. Some weapons are harder to determine, like Xiflelin, which seems to be made of both.