This is a lovely platinum diamond engagement ring from the 1920s. The center stone is an old mine cut diamond that weighs approximately 1.09ct. The color of the diamond is G-H and the clarity is SI2. The center diamond is accentuated by smaller round cut diamonds accents and captivating milgrain, open work and gallery design. The ring is size 5 3/4 but can be resized. The ring is stamped 10% IRID PLAT. The Universal Gemological Services (UGS) appraisal value of the center diamond is worth $9,155.00