HI, the stone stone of this ring is a natural, earth mined, chrome diopside, 5 mm, round shape, 0.45 carats, v v s clarity. I have 3 of this rings for sale, one in rose, one in yellow and the one in the pictures in rose gold. They are made in 14kt solid gold. The size of them is 7.75. I offer change the size of the rings to any size from 3 to 13 with no extra charge, so if you buy it, for a faster service, please send me a message telling me the color of the ring and the size that you need. The weight of the ring is 4 grams; 7 mm wide. LOVE IT OR RETURN IT.