User blog:Eres - Mistress of Illusions/Questions on Dust

First off, I'm not sure if this is the best place to pose this question, but I see it as the simplest means to do so.

Now, my question is on the function of certain kinds of Dust. Specifically, Black Dust and White Dust.

I have it in my head that they both have something do to with gravity, but I'm not entirely sure on that. From the show it seems like Black Dust acts like a pulling force and White Dust is a pushing force. Is this accurate or am I crazy or do any of you actually know?

Can any of you offer any more information on this subject? Thank you.