HI, the center stone of this ring is a rose quartz, 11x9 mm, emerald cut, 3.5 carats, v v s clarity. The ring is made in .925 sterling silver, 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 4.3 grams; 14 mm wide. LOVE IT OR RETURN IT.