I have one of these bags too, but the marbles are different. And mine are definitely cat's-eyes. Very defined, kind of bar-like vanes, mainly mixed red, white, light blue, yellow, orange . . . I think I got the bag from . . . Charles? moremarblesforme? If so, maybe he has a pic --
Some of the ones in Stefan's bag look kind of sparklerish. Sparkleroid. Hard to tell through the plastic.