Old Mexican Silver Brooch

I have seen this design made by several makers. My brooch has no makers mark. I guess I will never find out who made it. I still love it and I will wear it when I have fixed tow of the carved stones. All for stones are in very good condition but two fell out. I guess I can use some glue to put them back securely, but I am not sure what to use.

Thanks for looking:)