RN0020-SV-19 925 silver 2 stone 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/762-RN0020-SV-19-ring-925-silver-tanzanite.html