Vintage Two-Tone Illusion Set Diamond Engagement Ring

This is a vintage engagement ring featuring a two-tone metal construction. The ring is designed with a yellow gold band and a white metal (likely white gold or platinum) decorative top section. The central focus is a square-shaped illusion setting, which uses faceted white metal to make a small central diamond appear larger. The center motif is flanked by two rectangular shoulders, each containing a small accent stone, possibly single-cut or melee diamonds. The style is characteristic of the Mid-Century Modern or late Art Deco period (circa 1940s-1950s), known for its geometric shapes and 'miracle' settings that maximized the brilliance of smaller stones. The craftsmanship shows typical period bead-setting and millgrain-like textures on the shoulders. Regarding condition, the metal shows a soft patina and minor surface abrasions consistent with age and wear. The prongs appear intact, though the high-polish finish on the white metal sections has dulled over time. There are no visible maker's marks or hallmarks from this angle, but such rings were commonly produced by mass-market jewelers of the era.