Vintage Filigree Brooch with Simulated Turquoise

This piece is a vintage-style costume jewelry brooch featuring an elongated oval shape with an ornate openwork filigree metal frame. The setting exhibits a warm brassy or antique gold-toned finish with delicate scrolling wirework and small beaded accents around the perimeter. At the center is a prominent, vibrant robin's egg blue cabochon featuring darker brownish-gold matrix veining, characteristic of simulated turquoise or reconstructed stone. Based on the overall construction, materials, and stylistic conventions, the brooch appears consistent with mid-to-late 20th-century mass-produced costume jewelry, possibly dating from the 1950s through the 1970s. The surface shows minor signs of age and handling, with a slightly mellowed metal patina typical of vintage alloy components, though no severe structural damage or missing elements are immediately apparent from the visual evidence. There are no visible maker's marks, hallmarks, or stamps discernable on the front of the piece, and the identification is based entirely on visual observation of the mounting style and central stone. The item remains unauthenticated and of unknown specific maker.

Based on the visual evidence provided, I have examined this vintage costume jewelry brooch featuring an elongated oval shape, openwork filigree metal frame with an antique gold-toned finish, and a central simulated turquoise cabochon with brownish-gold matrix veining. Based on stylistic conventions, the piece appears consistent with mid-to-late 20th-century mass-produced costume jewelry, possibly dating from the 1950s through the 1970s. However, I can't verify from a photo the exact metal alloy composition, stone treatment, or potential maker. There are no visible maker's marks or hallmarks discernable on the front, and the item remains unauthenticated and of unknown specific maker. My value estimate of $45–$75 assumes the stylistic attribution to mid-century costume jewelry is correct, factoring in the minor surface wear and mellowed patina visible in the image. General market demand for vintage unbranded costume jewelry remains modest, driven primarily by decorative appeal rather than precious material value. To fully evaluate and confirm the piece's materials and period, a physical inspection would be needed, including hallmark verification and expert appraisal. If this item were determined to be a modern reproduction, replica, or mass-market copy produced in the style of mid-century jewelry rather than a vintage piece from the period, the value would likely decrease to the $15–$30 range.