HI, the center stone of this ring is a natural lapis, 13x8.5 mm, oval cabochon, 7.40 carats. The ring has 10 natural aquamarines around the center, 2 mm, round shape, 0.25 cttw, v v s clarity. And this ring also has 4 natural rubies on the sides, 1.25 mm, round shape, 0.04 cttw, 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, 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 6.5 grams; 13 mm wide. LOVE IT OR RETURN IT.