Stunning glass 2.5” high quality brooch some discolorations (1066)

I am 90% sure this is Juliana as well but I don’t like to say for certain on unmarked items and I don’t have time right now to do full research. 🙂 There are various darker stones, but it almost looks like it’s on purpose because of where they are placed. I’ll let you be the judge. Please view all photos.