HI, the center stone of this ring is a natural, earth mined, aquamarine, 7x5 mm, emerald shape, 0.75 carats, v v s clarity. The ring has 4 natural blue sapphires, 2 mm, round shape, 0.12 cttw, v s clarity. And 2 natural amethyst on the sides, 4 mm, trillion shape, 0.30 cttw, v v s clarity. The ring is made in 14kt solid gold. I have 3 of this rings, one in yellow, one in rose and the one in the pictures in white gold. The size of the rings is 7.75. I offer change the size of the ring to 3 to 13 with no extra charge, so if you buy it, just send me a message telling me the color of the ring and the size that you need. the weight of the ring is 4.2 grams; 8 mm wide. LOVE IT OR RETURN IT.