HI, the center stone of this ring is a natural, earth mined, peridot, 7x5 mm, emerald shape, 0.75 carats. The ring has 4 natural blue sapphires, 2 mm, round shape, 0.10 cttw, v s clarity. And the ring also has 2 natural amethyst on the sides, 4x4 mm, trillion shape, 0.30 cttw, v v s clarity. The ring is made in 925 sterling silver. The size of the ring is 7.75. I offer change the size of the ring to any size from 3 to 13 with no extra charge, so if you buy it, just send me a message telling me the size that you need or if you want the ring like is. The weight of the ring is 3.4 grams, 8.5 mm wide. LOVE IT OR RETURN IT.