Vintage Blue Purple Rhinestone Brooch Aurora Borealis Large WOW

Light AB wear See photos I thought maybe Juliana but I can't verify it and don't see the typical telling signs so selling as Unmarked I ship daily, 6 days a week Please see photos for measurements and condition I do not deep clean the jewelry,  especially the vintage. I clean with microfiber cloth.   I do not want to damage it.   I do not leave backs on earrings for sanitary reasons unless in super condition.