RN0020-GW-19 white gold two gemstone ring with tanzanite and diamond. The 4mm round gems have an approximate weight of 0.23 carats and a metal weight of 6 to 8 grams. Read complete details for this gorgeous ring at http://www.jewelat.com/shop/rings/759-RN0020-GW-19-ring-white-gold-tanzanite.html