Modernist Space Age Silver-Tone Geometric Brooch With Black Cabochon Atomic

Sleek modernist space age brooch with a glossy black domed cabochon and geometric silver-tone bar design accented by an open ring. Clean, architectural lines with mid-century flair. Unmarked. Secure pin back. 4 1/4"long x 1 1/4"wide across cabochon area Good vintage condition.