AI Appraisal Estimate

This circular sunburst brooch features a multi-tiered radial design constructed from darkened, antique-finished brass or base metal. The piece is set with numerous round, turquoise-colored glass or resin cabochons. Each stone is held within a small bezel or prong setting, arranged in concentric circles that emanate from a central large stone surrounded by smaller petals. The metalwork consists of thin radial spokes connecting the inner and outer rings, creating a sophisticated openwork or filigree appearance. The stones possess a soft, milky opacity, characteristic of faux turquoise or opalite glass, with several displaying subtle iridescent flashes that suggest an Aurora Borealis coating. The overall construction appears to be high-quality costume jewelry, likely dating from the mid-to-late 20th century or a modern vintage reproduction. The condition is excellent with no missing stones; however, there is visible darkening on the metal prongs and spokes, which may be intentional patination or natural oxidation over time. No visible maker's marks are present on the front, but the piece carries a white paper price tag, suggesting it is a retail or resale item.

Based on my visual examination of this sunburst turquoise cabochon brooch, I have identified it as a high-quality piece of vintage-style costume jewelry. The construction, featuring darkened brass settings and radial filigree, points toward the mid-20th century aesthetic, though the absence of a maker's mark suggests a mass-market production rather than a designer-signed piece like those from Trifari or Haskell. The 'turquoise' stones appear to be glass or resin cabochons with a slight Aurora Borealis finish, which adds to the visual complexity but confirms its status as decorative rather than fine jewelry. The condition is excellent, with all stones intact, though the intentional patination on the metal makes it difficult to distinguish between original design and age-related oxidation. In the current secondary market for vintage costume jewelry, sunburst motifs remain popular, but the lack of a designer signature limits the upper value range. Comparables on platforms like Etsy and Ruby Lane for unsigned, mid-century style brass and faux-stone brooches typically sell within the $40 to $80 range. I must note that this appraisal is based on image analysis alone. A physical inspection is required to confirm the density of the metal, verify if the stones are paste or gemstone, and check for hidden hallmarks on the pin assembly. Scientific testing via XRF for metal composition or refractive index testing for the cabochons would be necessary to rule out higher-end materials, though all visual indicators currently suggest a base-metal costume piece.