Vintage Victorian-Style Oval Bar Brooch with Black Spinel or Onyx Glass

This is a vintage bar-style brooch featuring an ornate, lozenge-shaped gold-tone metal frame. The focal point is a centrally mounted, oval-faceted black stone, likely an onyx glass simulant or black spinel, secured within a multi-pronged saw-tooth setting. The metalwork displays a rich, antiqued gold finish with a light patina in the recessed areas, highlighting various textures. The design incorporates intricate embossed filigree patterns, including fan-shaped motifs (palmettes) flanking the center stone and stippled textures on the outer edges. The construction appears to be die-struck or cast base metal with a yellow gold plating. In terms of condition, there is minor surface wear and some dust accumulation within the fine crevices of the metalwork, but the stone appears securely set without visible chips or abrasions on the facets. The style is heavily influenced by the Revival movements of the mid-20th century, specifically mourning jewelry aesthetics from the Victorian era. The craftsmanship is typical of high-quality vintage costume jewelry, showing clear definition in the scrollwork and a sturdy weight. No visible maker's marks are apparent on the front face.

I have conducted a visual examination of this vintage bar-style brooch. The piece displays characteristic Victorian Revival aesthetics, popular during the mid-20th century. My assessment indicates a gold-plated base metal construction featuring a well-preserved central black faceted simulant, likely glass or paste. The saw-tooth setting and die-struck filigree work are indicative of mass-produced yet high-quality costume jewelry production, showing minor oxidation and patina consistent with age. The current market for unsigned Victorian Revival costume jewelry is stable, with demand driven by 'dark academia' and 'mourning jewelry' fashion trends. Comparables found on secondary markets for similar non-designer plated brooches typically fall within the $40 to $70 range. The value is primarily driven by the aesthetic appeal and integrity of the filigree rather than precious metal content or gemstone rarity. Limitations: This appraisal is based solely on high-resolution imagery. Without a physical inspection, I cannot definitively determine the base metal composition or distinguish between black spinel and glass via refractive index testing. A professional acid test is required to verify gold-plate thickness, and a loupe examination of the pin assembly (hinge and C-clasp) would be necessary to more precisely date the piece. Provenance documentation or a maker's mark discovered under magnification could potentially increase the valuation if attributed to a known house like Sarah Coventry or 1928 Jewelry Company.