Board Thread:General Discussion/@comment-5047068-20141123201355/@comment-25555436-20150120004612

Cinder uses Fire Dust man. Dust, at least the ones shown in the show and the WoR, are elemental. Water, lightning, fire, wind, earth...glass is not elemental, nor has it been shown nor mentioned so far neither in or out of universe. As such, until shown in the show or said otherwise by Monty, Glass Dust is as good as not-existant in Remnant.

Also Conrad, it could even more than likely be Ilusion, or similar. Explains the "shattering glass effect" and how they didn't see Neo and Roman escaping to the ship in ep4, and even justifies the example above in the original post of this thread.