"Opalite" is a song by the American singer-songwriter Taylor Swift from her twelfth studio album, The Life of a Showgirl (2025). Swift wrote and produced "Opalite" with the Swedish musicians Max Martin and Shellback. Titled after artificial opals, "Opalite" is a love song about how Swift and her romantic partner create happiness together after a string of miseries in previous relationships. Using gemstone metaphors, the lyrics visualize painful experiences as dark "onyx" nights and subsequent joy as a bright, opalescent sky. It is an upbeat pop rock, soft rock, and synth-pop track, driven by a jangle, a disco groove, and a bouncy swing arrangement of bass and vocal harmonies.