Iridized

Iridized refers to an object or surface that exhibits iridescence, a phenomenon where the color appears to change when viewed from different angles. This effect is caused by the interference of light waves reflecting off multiple thin layers. These layers can be microscopic structures within the material itself or applied coatings. The precise thickness and spacing of these layers determine the wavelengths of light that are reinforced or canceled out, resulting in the observed colors.

Common examples of iridized surfaces include the wings of certain insects, like butterflies and beetles, where the structural coloration arises from microscopic scales. Mother-of-pearl, also known as nacre, found in the shells of mollusks, is another well-known example. This iridescent effect is achieved through the arrangement of aragonite crystals in thin, stacked layers. In manufactured items, iridization can be achieved through thin-film deposition processes, creating shimmering effects on glass, plastics, or metals. This technique is used in decorative applications, such as iridescent paints, glasswork, and fashion accessories, as well as in more functional contexts like anti-reflective coatings where the interference can be engineered to reduce unwanted reflections. The colors observed are not inherent properties of the material but rather a result of the way light interacts with its surface structure.