Marquise, Amethyst Solitaire Ring with Channel set 1/4Carat Diamonds, 14 karatThe amethyst measures 10 x 5 millimeters and weights approximately 1.00 carat. Rich deep purple color12 channel set diamonds have a total weight of approximately 1/4carat. Quality of diamonds are SI1 clarity and G-H color. Widest shank width is 4.8 mmRing size 6.5 and weight of ring is 3.5 grams. Shank of ring is 4.GIA Gemologist inspected and evaluated