Mid-20th-century style Aurora Borealis rhinestone brooch

This piece appears to be a vintage costume jewelry brooch, stylistically consistent with mid-20th-century designs, particularly from the 1950s or 1960s. The brooch features a triple-wreath or tiered circular silhouette, set with numerous round faceted rhinestones that exhibit an 'Aurora Borealis' (AB) coating. This iridescent finish reflects a spectrum of colors including violet, blue, and gold. The stones are held in a dark-toned metal setting, possibly aged brass or gunmetal-finish pot metal, which shows evidence of patina consistent with age. Each stone is individually prong-set, which is often a signal of better-than-average costume jewelry craftsmanship. No maker's marks or signatures are visible from the upward-facing photo; thus, the attribution to a specific designer or manufacturer remains a hypothesis subject to physical inspection. The user has categorized this as jewelry, which is consistent with its visual form as a lapel or dress pin. The condition appears fair, with the metal showing some dulling and the stones retaining their iridescent flash, though the back pin mechanism is not visible to confirm its functional integrity.

Based on my visual analysis of the provided image, this brooch appears consistent with mid-20th-century costume jewelry, likely dating from the 1950s or 1960s. The piece features a multi-tiered circular design set with individually prong-set rhinestones bearing an Aurora Borealis (AB) finish. This finish provides a distinctive iridescent flash, which, from what I can see, appears well-preserved despite some visible patina on the metal setting. The use of individual prongs rather than glue often signals a higher level of mid-tier costume jewelry craftsmanship. However, I cannot verify the manufacturer, as no hallmarks or signatures are visible; the hypothesis that this is a designer piece remains unconfirmed without a physical inspection of the reverse side. The current estimate assumes the piece is an unattributed high-quality vintage item. Market demand for 'unsigned beauties' of this era remains stable among collectors of mid-century fashion, though the value would likely increase significantly—potentially reaching $100-$150—if the piece were found to bear a signature consistent with sought-after makers like Weiss, Eisenberg, or Kramer. Conversely, if the stones are found to be acrylic rather than glass upon physical testing, or if the pin mechanism is damaged, the value would likely fall below $20. To provide a more precise valuation, I would need to examine the clasp type, check for hidden maker marks, and confirm the material of the stones. Authentic vintage status is assumed based on the stylistic cues, but cannot be definitively established from a photograph alone.