The term "opalescent" describes a surface that exhibits a play of colors, similar to that seen in an opal gemstone. This effect occurs when light interacts with microscopic structures, creating a shimmering, iridescent appearance. Opalescent materials can appear to change color depending on the angle of light and the viewer's perspective. Common examples of opalescent items include certain types of glass, ceramics, and even some natural phenomena like soap bubbles. The unique visual quality of opalescence makes these objects particularly appealing in art and design, as they can add depth and interest to various creations.