varying in color when seen in different lights or from different angles
"changeable taffeta"
"chatoyant (or shot) silk"
"a dragonfly hovered, vibrating and iridescent"
having a play of lustrous rainbow colors
"an iridescent oil slick"
"nacreous (or pearlescent) clouds looking like mother-of-pearl"
"a milky opalescent (or opaline) luster"
Producing a display of lustrous, rainbow-like colors; prismatic.