This is a gorgeous vintage brooch that is made of filigree silver tone pot metal with deep tanzanite blue navette rhinestones and a light blue chaton rhinestone in the center, which has an open back to let light through. First photo brooch is propped to let light in, second photo is flat on a table top. Made in two pieces, top piece held on to bottom piece by two rivets on back. Unsigned. Long rollover clasp pin, prong set rhinestones. Large piece, measures 2.5" across. Dates from 1940's to 50's, nice condition, no missing stones, metal has developed a patina.