Vintage Silver-Tone Lozenge Brooch with Rhinestone Accent

This item is a vintage costume jewelry brooch featuring a refined, elongated diamond or lozenge shape. The piece is constructed from a silver-tone base metal with a brushed or semi-matte finish that provides a soft, metallic sheen. The most prominent design feature is a triangular inset located toward the upper apex, which is paved with small, clear round-cut rhinestones. These stones appear to be glass or crystal, set in a traditional pavé style. The overall design exhibits the sleek, geometric aesthetics common in Mid-Century Modern or Art Deco revival jewelry, likely dating from the mid-20th century. The brooch body has a subtle convex curve, adding three-dimensional depth to the flat geometric silhouette. Regarding condition, the metal surface shows minor surface abrasions and fine scratches consistent with age and previous wear. There is a slight patina or darkening in the recessed areas surrounding the rhinestones, though all stones appear to be present and intact. The craftsmanship is typical of mid-market commercial costume jewelry, emphasizing clean lines and balanced proportions rather than ornate detail. No visible stamps or maker's marks are discernible from the front, suggesting any branding would be located on the reverse pin mechanism.

I have conducted a visual examination of the vintage silver-tone lozenge-shaped brooch via high-resolution imagery. The piece exhibits a mid-century geometric aesthetic, characterized by a convex lozenge form and a rhinestone-pavé triangular inset. My assessment confirms the item is a piece of commercial mid-market costume jewelry, likely dating from the 1950s or 1960s. The physical condition appears good for its age. While I observed minor surface abrasions and some oxidation in the recessed settings of the rhinestones, the stones remain intact and the silver-tone plating shows no significant 'pilling' or base metal exposure. The lack of a visible maker's mark on the obverse indicates this is likely an unsigned piece, which places it in a different market tier than signed works by houses like Trifari or Monet. The market for unsigned mid-century costume jewelry is stable but highly saturated. High demand currently exists for bold, architectural pieces, though the lack of identifiable branding limits its rarity and investment potential. Comparables for unsigned geometric brooches of this size and material typically sell within the $35 to $75 range at specialty vintage boutiques. Limitations: This appraisal is based solely on visual inspection of the provided description and images. A definitive authentication of the base metal (e.g., sterling silver vs. silver-plated pot metal) and the composition of the stones (e.g., lead crystal vs. molded glass) would require in-person testing. Furthermore, a physical inspection of the pin-back mechanism—specifically the hinge and C-clasp—is necessary to confirm the exact manufacturing period and ensure structural integrity.