Vintage Topaz Rhinestone & Amber Glass Bead Brooch

This amazing vintage brooch is unsigned, but definitely high end! If anyone knows the maker, I would appreciate some help! It features 3 large topaz pear shaped rhinestones, with large aurora borealis chatons, and smaller champagne colored chatons. There are faceted amber glass beads set up higher than the rhinestones, giving it dimension. On the back, you can see the interesting construction....the amber beads are in a golf tee shaped setting. I have never seen anything like it! This brooch measures 2 1/4" x 1 3/4" and is in excellent and super sparkly condition.