Art Deco Platinum and Diamond Filigree Ring

This is a vintage Art Deco period engagement ring, likely dating from the 1920s to 1930s. The piece features a central Old European cut diamond of significant size, estimated at approximately 1.5 to 2.0 carats, held within a four-prong box-style setting. The center stone exhibits a high crown and small table, characteristic of early 20th-century cutting techniques. Two smaller round transitional or single-cut diamonds are bezel-set into the shoulders of the mounting, flanked by intricate hand-pierced filigree work and milgrain detailing. The mounting is crafted from a bright white metal, most likely platinum or 18k white gold, which was standard for this era. The gallery of the ring shows complex geometric openwork, and the shank tapers toward the back. Regarding condition, the metal shows a soft patina and minor surface scratches consistent with long-term wear. The prongs appear slightly worn but still securely hold the main gemstone. There is some visible buildup of skin oils and debris beneath the pavilion of the stones, which dulls the internal light reflection, but no major chips or fractures are immediately apparent on the diamond crowns from this perspective. The craftsmanship is of high quality, indicative of custom-made jewelry from the early 20th century.