Then you're a full-fledged member of the Club!
I might have too many sub-categories for some people, but here's how I usually think of it -- and now that I think of it, I'm not sure I'd call it an onionskin, either . . .
Threads or blotches or streaks of color on white or yellow (although the the core is generally transparent colorless) = onionskin.
Threads or blotches or streaks of color on transparent colorless glass = banded transparent.
Narrow, equally-sized threads or ribbons (of a variety of colors) running from pole to pole on a transparent colorless (or sometimes tinted) base = Joseph's Coat.
Don't know if that helps any. I'll see if I can find some good examples.