Iridescent refers to a surface that displays a spectrum of colors that change when viewed from different angles. This optical phenomenon occurs due to the interference of light waves, often seen in materials like soap bubbles, peacock feathers, and certain types of shells. The vibrant colors can create a shimmering effect, making iridescent objects visually striking. Common examples of iridescent materials include oil slicks on water, where the colors shift as the angle of light changes, and mother-of-pearl found in some shells. Iridescence is also used in fashion and design to create eye-catching effects in clothing and accessories.