HI, the center stone of this ring is a natural, earth mined, purple sunstone, 8x6 mm, oval cabochon, 1.35 carats. The ring has 6 natural rubies, 1.25 mm, round shape, 0.06 cttw, vs clarity, hand set. The ring is made in .925 sterling silver, and is available in any size from 3 to 13 at the same price, so if you buy it, just send me a message with the size that you need. The weight of the ring is 3.3 grams, 7.7 mm wide. LOVE IT OR RETURN IT.