HI, the center stone of this ring is a natural, earth mined, ametrine, 9x6 mm, emerald shape, 2.00 carats, v v s clarity. The ring has 2 natural smoky quartz, 7x5 mm, pear shape, 1.00 cttw, v v s clarity. I have 3 of this rings, one in white, one in rose, and the one in the pictures in yellow gold. The size of the rings is 7.75. I offer change the size of the rings 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 the color of the ring and the size that you need. The weight of the rings is 7 grams; 11 mm wide. LOVE IT OR RETURN IT.