Iridescence is an optical phenomenon characterized by dynamic, shimmering colors that shift with the observer’s perspective. Also described as rainbow-like or nacreous, this effect arises from the interaction of light with transparent or semi-transparent surfaces. The modulation of reflected light amplifies or attenuates specific frequencies, creating its distinctive, ever-changing appearance. The composition Iridescence is an electroacoustic interpretation of this phenomenon, capturing its fluid, luminous essence through sound.