User blog comment:Sorairo/Aura, Dust, and the RWBY Panel/@comment-99.90.70.202-20130823061805/@comment-226878-20130909060108

I think that's the point. Man felt it appropriate to name this substance Dust because they felt it was the same element that had given birth to them. Why would they call it Dust otherwise? It's raw unrefined form seems to be crystals. Why call it Dust? Seriously...