Antique 18ct Gold & Platinum, 1920s Art Deco Sapphire and Diamond Marquise Ring

This 1920s Art Deco ring features a marquise-cut diamond set in a combined 18-carat gold and platinum mounting. The colorless diamond is complemented by sapphire accents characteristic of the period's design aesthetic. The use of platinum in the setting reflects the era's preference for this durable precious metal in fine jewelry. The ring represents typical Art Deco craftsmanship with its geometric proportions and mixed-metal construction.