HI, the center stone of this ring is a natural, earth mined, cat's eye alexandrite, 4.5 mm, round cabochon, 0.65 carats. The ring has 12 natural diamonds, 1.00 mm, round shape, SI1 clarity, color g-h, 0.10 cttw, hand set. The ring is made in 14kt solid white gold. 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, for a faster service, please send me a message telling me if you want the ring as is or the size that you need. The weight of the ring is 5.5 grams; 9.5 mm wide. LOVE IT OR RETURN IT.