Vintage 50s Geometric Funky Black Enamel Brooch / Pendant with Rhinestones

Very interesting and unique enamel brooch circa 1950s in the art deco / art modern style. Featuring gold-tone metal, black enamel and sparkling glass rhinestones. The dimensions are about 1x3.6". Good vinatge condition: some minor dents on the enamel and some chipping on one corner of the large rhinestone - not really noticeable unless you look closely. None of the rhinestones are missing and the pin mechanism works. Can be worn as a brooch or you can thread it onto a chain and wear as a necklace.