User blog comment:ChishioKunrin/Dust Speculation and Whatnot/@comment-3387274-20150108201656

I think it was confirmed that Cinder's weapon and the plates on her outfit were both volcanic glass, ie obsidian. As for Blake's clones, I suspect this is because she's using it in a more basic way than Weiss. Also, taking account of the effects she had as well as the colours in the clip might let us get some by process of elimination. Annoyingly, the ones we know didn't seem to go off in order, so we can't just go with that. I suspect the big energy slash she finished Roman off with was another dust effect, since they've never been at range like that before, and produced a definate hum.