Vintage Coro Teardrop Faux Pearl Drop Screw Back Earrings.

Design: Each earring features a round pearl at the top near the closure and a larger, dangling teardrop-shaped pearl. The teardrop pearls in your image appear to be faux pearls (often made of glass or plastic with a pearlescent coating), which was a standard material for costume jewelry of that era.

Hardware: The metal is likely a silver-tone alloy or sterling silver. Screw-backs were designed for non-pierced ears, allowing the wearer to adjust the tension by turning the small dial at the back.

Aesthetic: This "double drop" style is often associated with Art Deco or Mid-Century designs and is frequently used for bridal or formal vintage looks