ah, ok we used one of those (crystalized stuff inside a
gobo that spun) a couple of years ago for "The Wiz" i thought it was called something more like prizmatic or something like that... I am looking on that site right now.
Ya, it looks like a colorizer is something similar, but does not necessaraly move like the one we used did (the plastic/glass inside tumbled arround a little when it spun). Thanks!