User blog comment:Deafro/Theory on Dust Manufacturing/@comment-4773581-20140112153919/@comment-16763585-20140112160926

Isn't Aura replenishable? I wouldn't think that was a finite quantity, but maybe I missed something.

As for the complexity of the process its still very possible to do it without current tech, its just not as safe and not as fast. Even if people hadn't figured out how to generate electricity, they could try lightning. Energy of motion is as easy as shaking the canister. Light is probably the simplest, just leave it in a thin box outside so that the sun's radiation can cut through the layers. All that's left then is to get it to a point where it can revieve this energy, and that involves getting the dirty Dust to give its energy into doing work. How that is done is a rather complicated process that I can't fully explain, but I do like the flavor of refining natural Dust into a form people can use, much like how ore is refined into metal.