All RS Covenant rings are made of either Sterling Silver or Jeweler’s Bronze (a brass alloy). Every ring is made one at a time and every ring is hand-polished. The finish is the most important part of any piece of fine costume jewelry. RS Covenant rings have the best finish that money can buy. The genuine Cubic Zirconia stones are custom-cut and hand-set, just like a diamond. They all have the look of fine jewelry.