Vintage Vintage Blue Glass Rhinestone Screw Back Earrings

No maker’s mark Vintage Blue glass rhinestones Prong setting Gold tone metal Round and octagon cut rhinestones Note: on my screen the earrings appear to be a sapphire blue but in person they are more of a topaz blue. The pictures make the stones appear darker. Measures approximately 3/4 x 7/16 inches Great vintage condition!