User blog comment:Sorairo/On the Topic of Dust: Explanation?/@comment-23784953-20130813085449

Alright let's first clear out a few things that was pointed out to you.

Once again, Man isn't born from Dust, the more literal term is "borne from the earth". This was a little mistake on the narration. Dust *may* have existed long before man, but it contradicts the idea that they were born from it, but discovered it much later, when they literally should've seen it right beside them.

Zolnir and Mr. Ob(li)vious has clarified a few things already, so I'm just going to recap some statements.

Red, as stated, may represent energy. (Given that it repelled the Giant Armor AND made Ruby explode) That's all we know so far.

Orange is already confirmed to be fire, as demonstrated by Crimson.

Yellow is probably correct as well. To confirm, when Ruby exploded, an explosion of red, ice and electricity occurred.

Green is arguable, since we haven't seen it in action. The upcoming episode takes place in a forest, so there can be a chance that a demonstration of Green Dust may occur, courtesy of Lie Ren or Ozpin or... whatever the hell's down there.

Light Blue is Ice. No discussions.

Blue... is probably water. This is all quack, but maybe Light Blue is an artificial Dust derived from Blue Dust. We don't know just how Dust really works, hell I theorized that the Schnee family may be alchemists when Weiss' twitter was unveiled before RTX. I don't think it's outside their capability to create artificial Dust.

Violet may be the magic-oriented version of Dust. It literally looks like magic when used. As you noted, Weiss used it for her Air Step, which may be her personal spell. Also, you missed the other time Glynda used Violet Dust: To shoot out a bunch of homing violet rays towards Roman's ship. Due to this, I'd say this is the starter Dust for those who wanna become Dust mages, with Glynda being an incredibly skilled user of it already.

Gray is possibly the fuel version of Dust. It's used to operate machinery and the like.

However, isn't it possible that Gray Dust and White Dust are one and the same? We've never seen any vial or crystal of a White Dust before. Sure, it may be rare that Weiss is the only one who can use it, but until we've seen her setting up Myrtenaster, I cannot prove this theory.

An alternative for the above is that White Dust is the combination of all Dust, for personal usage by the SDC. Or to create Captain Planet. Whatever it is, it's powerful enough that it decimated a Giant Armor in a single hit.