Vintage pin pewter like scroll work flower center aqua turquoise stone 2 1/2" diameter

This large vintage pin is 2 1/2" in diameter and features elaborate scroll work done in a metal that has the appearance of pewter. The middle of the pin has a raised flower with an aqua 1/4" round stone in the center. I believe the stone in the center is real turquoise--a stone, not plastic. This is an unmarked pin. I included a photo of the back so you could see the details. This comes from an estate and is in excellent condition on the front and the back.