Working with recycled glass has its challenges. Sometimes the color does not chemically mix well. Sometimes after making a few hundred pieces we get a little lazy, and mis-shape the product, and sometimes there is a little bit of refractory in the glass. All of these products are separated as Quality 2nds. Colored glass cannot be re-melted in a clear glass kiln, so we accumulate these items and offer them for a big discount. These items are great for use in ponds, garden art, or outside decorations. Sorry no returns or exchanges on Quality 2nds.