Van Gogh Glass is clear glue chip glass that is painted on the back with metallic automotive type pigment. This brings out the fern-like pattern of the glue chip glass and creates an unusual, striking effect. The metallic paint on the back is covered with black paint, so the glass is completely opaque, and has a mirror-like depth. The glass is completely smooth on the front. GLASS IS FRAGILE, SHIP AT YOUR OWN RISK!