Vintage Black Enamel and Gold-Tone Filigree Brooch

This is an oval-shaped vintage costume brooch, approximately 2 to 3 inches in length. The primary material appears to be a gold-tone base metal, possibly brass or plated alloy, showcasing an aged patina that suggests some wear consistent with its age. The central feature is a convex black enamel or resin cabochon, which is set within an elaborate filigree gold-tone frame. The black enamel is glossy and appears to be in good condition with no obvious chips or cracks. Within the black enamel, there is an intricate gold-colored scroll or flourish design, reminiscent of intertwined S-curves or an abstract figure-eight, which adds a decorative focal point. Flanking the central black element, on either side of the oval, are small, clear paste stones or rhinestones, each set within a decorative starburst or floral-like setting. The outer edge of the brooch features a detailed, scalloped border with delicate scrollwork and granulation, typical of Victorian revival or Art Nouveau influenced designs. The craftsmanship suggests it was mass-produced but with attention to decorative detail. There are no visible maker's marks or signatures from the provided image. The overall condition appears good for its age, with a consistent antique-gold finish, though minor surface wear on the metal is evident upon close inspection. The general style points to a mid-20th century production, perhaps 1950s-1970s, due to the combination of dark enamel and ornate metalwork, common in costume jewelry of that period. The construction suggests a pin-back functionality, though the reverse is not visible in the image. The general quality is typical of decorative costume jewelry, designed for aesthetic appeal rather than intrinsic material value, yet possessing historical and stylistic charm.