Wissmach Glass Company White Iridescent Stained Glass Mosaic Tiles are 1/8 thick, opaque, iridescent on one side and white on the other. The iridescence this glass gives a bright pop of color to your project. You never know if you will see green, blue, pink or yellow as light hits your artwork from different angles. Stained glass mosaic tiles work wonderfully on stepping stones, hanging art, furniture, picture frames, drink coasters, mirrors and more!