Vintage Capitol Washington D.C earrings Glass and metal screwback 50s 60s

Souvenir pair of screwback earrings from the 50s or 60s. Glass with picture of the Capitol building and says, "Washington D C" I have not removed the back on the glass. Possibly reverse painted. Fun vintage item. Black with gold colored picture. Metal may be brass. Not positive. I have no way to test the metal. No returns.