Art Deco style screw-back drop earrings

This pair of vintage screw-back drop earrings features a delicate filigree metal construction, presenting a geometric, drop-shaped design characteristic of the Art Deco period. Each earring is set with a central light blue or aquamarine-colored faceted gemstone, enclosed in a detailed bezel with ornate metalwork. The metal displays a dark, aged patina, consistent with older costume jewelry or sterling silver items from the mid-20th century. The findings consist of screw-back mechanisms, which were commonly used for non-pierced ears during the early to mid-1900s. There are no clearly visible maker's marks, hallmarks, or stamps discernible from the image angle. The identification is based purely on stylistic elements such as the filigree work and screw-back hardware, and the item remains unauthenticated. The overall condition shows standard age-related patina and minor wear, but no major structural damage is apparent in this photograph.

Based on what I can see in the photograph, this pair of screw-back drop earrings presents stylistic elements consistent with the Art Deco period, including a delicate filigree metal construction, a geometric drop-shaped design, and period-appropriate screw-back hardware for non-pierced ears. The central light blue or aquamarine-colored faceted gemstones are enclosed in detailed bezels, accompanied by an aged patina. However, I cannot verify from a photo whether the materials are sterling silver or base metal, nor can I determine the precise gemstone composition without physical testing. I also do not observe any clear maker's marks or hallmarks from this image angle. Therefore, the attribution remains a working hypothesis based solely on visual aesthetics. Assuming the identification of a vintage mid-20th-century costume or semi-fine jewelry piece is correct, comparable items of this type typically trade in the $75 to $150 range in the current secondary market, driven by steady demand for Art Deco revival and vintage accessories. If physical inspection were to reveal the piece is a modern reproduction, copy, or made 'in the style of' rather than a period-authentic item, the value would likely decrease significantly to the $25 to $50 range. To establish a more precise evaluation and confirm authenticity, I would need a physical inspection, hallmark verification, and professional testing to determine the metal and stone types.