HI, the center stone of this ring is a natural, earth mined, green prehnite, 12x9 mm, oval cabochon, 5,8 carats. The ring has8 natural diamonds, SI1 clarity, color g-h, 0.08 cttw. It is made in 14kt solid white gold, size 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 4.8 grams; 16 mm wide. LOVE IT OR RETURN IT.