This is an amazing diamond platinum engagement ring from the 1920s era. The ring is centered with a sparkling old mine cut diamond that weighs approximately 1.00ct. The color of the diamond is H-I with SI1 clarity. The top of the ring measures 6mm by 6mm. The ring is stamped 100IRID900PLAT and inscribed 10-4-36. It weighs 2.2 grams. The ring is size 5 but it can be resized.