Red jeweler's rouge is for buffing gold, platinum, Sterling Silver, and more. White jeweler's rouge is for cut and shiny luster on steel, aluminum, and chrome. Due to the delicate nature of Dry Rouge, we cannot guarantee that there will be no cracks or breaks in the bars. Each bar weighs about 1 ounce and measures about 2 1/2 x 3/4 x 3/4 inch.