Vintage Purple Glass Rhinestone Flower Brooch

Gorgeous piece of jewelry. The pictures are not showing the true beauty. This one is older I would say approaching antique. Maybe 1930’s. The metal is very soft and scratches like silver and may have some silver content but is not sterling. Possibly this is pewter. It has a longer pin, unsigned I don’t see any markings. The faceted purple stones are glass and sit with open back settings. It’s quite large about 3.8” tall by just under 2” at widest point. This brooch is in excellent condition.