VINTAGE COSTUME JEWELRY SILVER TONE PRONG SET DOMED RED RHINESTONE BROOCH PIN

THIS LOOKS TO BE VERY OLD. I AM NOT SURE.. ALL OF THE STONES ARE PRONG SET. CHANGES INTO DIFFERENT SHADES OF RED WITH MOVEMENT. BROOCH IS 1/2" HIGH AND 1-3/4" WIDE. NONE OF MY JEWELRY IS EVER CHECKED FOR GOLD OR SILVER CONTENT.