This is an amazing diamond platinum engagement ring from the 1900s. The ring is centered with a sparkling old mine cut diamond that weighs approximately 0.78ct. The color of the diamond is H with VS clarity. The top of the ring measures 6mm by 5.5mm. The ring is stamped 10% IRID PLAT and weighs 1.7 grams. The ring is size 5 but it can be resized.