Any marble that has a name. Name doesn't have to be what "everyone" else calls it. Different regions can have different names, for example. Just say what you call it. And saying which company made it would be good too for newbies who might not know. (:
Akro Indian Blankets (these were Patry's). Some would say only the right hand one was an Indian Blanket -- because it's the one with yellow on both sides of the red ribbon -- but some would call 'em both that.