HI, the center stone of this ring is a natural, earth mined, Australian opal, 7x5 mm, oval cabochon, 0.55 carats, color play. The ring has 8 natural peridots on the sides, 1.5 mm, round shape, 0.10 cttw, v vs clarity. I have 3 of this rings, one in yellow, one in rose, and the one in the pictures in white gold. They are made in 14kt solid gold. The size of the rings 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 5 grams; 8 mm wide. LOVE IT OR RETURN IT.