HI, the center stone of this ring is a natural, earth mined , australian opal, 8x6 mm, oval shape, 0.55 carats, color play. The ring has 6 natural rubies on the sides, 1.25 mm, round shape, 0.06 cttw, v s clarity. The ring 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 grams; 8 mm wide. LOVE IT OR RETURN IT.