This is a very colorful and stunning brooch. It is unsigned. The piece has silver-tone metal with turquoise blue, emerald green, grass green and pale blue rhinestones. Lovely color combination. All the stones are prong-set. The brooch has no stones missing, chipped or broken. It measures 2 1/2" round. The clasp works fine. This piece would be stunning on a black suit or even a white lapel. I would date this fine brooch at c 1950's.