Art Deco, Diamond Dome Ring, Platinum, Circa 1875, 1.75 TCW. High Quality The center diamond is a European cut 6.57 x 3.50 mm round high quality diamond. The size is estimated to be 1.00 carat. The quality of the diamond is VS2, F color Accenting the filigree ring are (10) European cut diamonds, 1.95-3.50 mm in diameter. The rings total diamond weight is 1.70 carat. The quality of the diamonds are SI1-VS2 clarity and F color. Ring size is 5 GIA Gemologist inspected and evaluated