This is a fabulous platinum engagement ring. The ring is centered with a sparkling old mine cut diamond that weighs approximately 0.75ct. The color of the diamond is I with SI1 clarity. The center diamond is accentuated by emerald and diamond accents. The top of the ring measures 12mm in diameter. The ring weighs 4.5 grams. The ring is size 6 3/4 but it can be resized.