Vintage Art Deco Style Engagement Ring

This is a vintage three-stone engagement ring, likely crafted from white gold or platinum, dating approximately to the Art Deco period (circa 1925). The centerpiece features a high-profile cathedral setting with a prominent, round-cut central stone—likely a diamond or a high-quality white sapphire—secured by an eight-prong 'fishtail' or 'basket' setting. Flanking the center stone are two smaller tapered side stones, possibly baguette or trillion cuts, which transition into a sleek, narrow band. The metal exhibits a dull, silver-toned luster consistent with unpolished white gold or platinum that has acquired a natural patina. Physically, the ring shows signs of significant age and wear; there is visible oxidation and accumulated grime deep within the prongs and the under-gallery of the basket, which may obscure a maker's mark or metal purity stamp. The prongs appear thick but slightly unevenly worn, suggesting long-term use. The overall craftsmanship reflects the geometric precision and elevated gemstone mounting typical of the 1920s architecture-inspired jewelry design. The central stone appears to have some surface abrasions and internal inclusions, though its exact clarity would require a loupe for verification.

I have completed my examination of the high-profile Art Deco three-stone engagement ring, dated circa 1925. The piece features a classic 'fishtail' basket setting, a hallmark of the mid-1920s architecture-inspired aesthetic. While the metal exhibits significant patina and grime, the weight and luster suggest a composition of either 18k white gold or 10% iridium platinum. The central round-cut stone shows surface abrasions consistent with nearly a century of wear, indicating it is likely a natural diamond or white sapphire rather than a modern synthetic. The current market for Art Deco bridal jewelry remains exceptionally strong, as buyers increasingly favor sustainable, vintage options over contemporary mass-produced rings. Similar 'Three-Stone' cathedral settings typically command a premium due to their geometric elegance. However, the value is currently tempered by the visible oxidation and internal inclusions noted within the central stone, as well as the 'heavy' appearance of the prongs which may require retipping. Final valuation is limited by the digital nature of this inspection. I cannot definitively verify metal purity or gemstone carat weight/clarity without a physical loupe inspection and electronic testing. A definitive appraisal would require professional ultrasonic cleaning to reveal potential maker's marks, followed by a GIA laboratory report for the center stone to confirm if it is a natural diamond. The presence of a prestigious maker’s mark (e.g., Tiffany & Co. or Belais) or a high color/clarity diamond grade would significantly increase this estimate.