HI, the stone of this ring is a natural, earth mined, heated, bi-color sapphire, 8.6 carats, 16x11 mm, oval cabochon. 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 with the size that you need or if you need the ring like is. The weight of the ring is 7.5 grams; 19 mm wide. LOVE IT OR RETURN IT.