AI Appraisal Estimate

This circular costume jewelry brooch features multiple tiers of faceted oval and round glass stones. The stones exhibit an 'aurora borealis' (AB) finish, which produces a shimmering iridescent effect with flashes of blue, green, and yellow. The central round stone is surrounded by a ring of six oval stones, which are further bordered by six larger oval stones accented by scalloped metal flourishes. A final outer perimeter consists of smaller round rhinestones set in individual prongs. The mounting appears to be a silver-toned base metal. Stylistically, the use of large AB-finish stones and the tiered, domed construction is consistent with costume jewelry produced during the mid-20th century, particularly the 1950s and 1960s. No maker's mark or signature is visible in the provided image; therefore, an attribution to a specific designer or manufacturer cannot be made without a physical inspection of the reverse side. The condition appears fair to good Based on the photo, with some visible dust and light surface wear, but no immediately apparent missing stones or significant metal corrosion. The craftsmanship shows typical mass-market costume jewelry quality of its era, utilizing prong-set stones in a layered assembly.

Based on the provided imagery, I have examined this tiered, circular costume jewelry brooch. The piece displays characteristics consistent with mid-20th-century production, approximately the 1950s or 1960s, specifically the use of aurora borealis (AB) finished glass rhinestones and a multi-layered, prong-set construction. While the design is aesthetically pleasing, based on what I can see, there are no visible maker's marks or signatures. Therefore, the attribution remains hypothetical; I am treating this as an unattributed piece of mass-market vintage costume jewelry. The appraised value represents a range for an unsigned item of this style and era in good vintage condition. I cannot verify from a photo the structural integrity of the pin mechanism or the presence of subtle metal fatigue or corrosion on the reverse. The market for unsigned vintage costume jewelry remains stable among collectors who value the 'AB' finish and mid-century aesthetic, though prices are significantly lower than signed pieces from designers like Weiss or Eisenberg. To move toward a more specific identification, a physical inspection of the reverse side to search for a hidden hallmark or distinctive solder patterns would be necessary. Should the piece be found to bear a signature consistent with a high-end designer upon physical examination, the value could increase to $100-$150. Conversely, if the stones are found to be modern acrylic replacements rather than period glass, the value would likely drop below $15.00. Authenticity of the era cannot be established without confirmed provenance or in-person verification of the casting and plating techniques.