It is allegedly mixed with bleach and used by the coal industry to make the smoke look white. People don't like seeing black smoke.
Glitter is plastic and aluminum. You could just burn those separately if that's what you wanted. What's the purpose in making them into glitter first?
And in any case they wouldn't turn the smoke white. And there are better ways to get rid of black smoke (easier is add some air into the fire).
Who alleges this?