Art Deco Old Mine Diamond Engagement Ring in Platinum A striking example of Art Deco elegance, this antique engagement ring features a luminous old mine-cut diamond set within an intricate platinum filigree design. The meticulously crafted openwork setting, adorned with delicate milgrain and geometric motifs, embodies the architectural beauty of the 1920s and 1930s. This timeless treasure captures the essence of the Art Deco era, offering a harmonious blend of sophistication and history.