This is a gorgeous vintage onyx diamond platinum engagement ring from the Art Deco era. The ring is centered with a sparkling old mine cut diamond that weighs 1.72ct. The color of the diamond is J-K with VS clarity. The center diamond is accentuated by lovely faceted cut onyx and round cut diamond accents. The top of the ring measures 12mm by 12mm. The ring is stamped PLAT and weighs 6.1 grams. The ring is size 5 3/4 but it can be resized.