Vintage Art Deco Three-Stone Platinum or White Gold Diamond Ring

This is a vintage three-stone ring, typical of the late Art Deco or early Retro period (circa 1930s-1940s). The ring features three round-cut diamonds, most likely Old European or transitional cuts, grain-set into square-shaped illusion box settings. This architectural style was popular for maximizing the perceived size and brilliance of the stones. The mounting is crafted from a bright white metal, which, given the era and color, is likely either 14k-18k white gold or platinum. The gallery and shoulders of the ring exhibit fine open-work and geometric, tiered 'skyscraper' detailing, a hallmark of Art Deco design. The shank appears to have delicate engraving or milgrain work that has softened over time. Regarding condition, the metal shows signs of honest wear with a light patina and softening of the sharp edges of the settings. The prongs appear mostly intact, though the milgrain on the bezel edges shows moderate smoothing. No specific maker's marks are visible from this orientation, but the high-quality craftsmanship, characterized by the clean geometric lines and precise stone seating, suggests a skilled jeweler. The central stone is flanked by two slightly smaller side stones, creating a balanced and classic three-stone silhouette.