Vintage Art Deco Three-Stone White Gold Diamond Engagement Ring

This is a vintage three-stone engagement ring, likely dating from the late Art Deco to early Retro period (circa 1930s-1940s). The ring is crafted from a white metal, likely 14k or 18k white gold or platinum, featuring a central round-cut clear gemstone—possibly an Old European cut diamond. The center stone is held in a square-shaped illusion setting, a popular design choice of the era intended to make the stone appear larger and more rectangular. On either side of the center stone are two smaller round accent stones, which appear to be single-cut or brilliant-cut diamonds. The band and gallery showcase ornate filigree and openwork detailing, characteristic of high-quality craftsmanship from the early 20th century. Notable features include fine milgrain edging and decorative engravings along the shoulders. Regarding condition, the metal shows signs of moderate wear with small surface scratches and a dulling of the polish, which is expected for an heirloom piece. The stones appear securely set, though the prongs show some rounding from use. There are no visible hallmarks in the image, but the construction suggests professional jewelry manufacturing. The overall aesthetic is romantic and delicate, representing the transition from geometric Art Deco styles to the softer lines of the mid-century.