This is a fabulous platinum solitaire engagement ring. The ring is set with sparkling GIA certified round brilliant cut diamond that weighs 1.00ct. The color of the diamond is D with Internally Flawless clarity. The top of the ring measures 6mm in diameter. The ring is stamped PLAT and weighs 4.1 grams. The ring is size 4 3/4 but it can be resized.