ir·i·des·cent 
(ĭr′ĭ-dĕsənt)
(ĭr′ĭ-dĕsənt)adj.
1. Producing a display of lustrous, rainbowlike colors: an iridescent oil slick; iridescent plumage.
2. Brilliant, lustrous, or colorful in effect or appearance: "The prelude was as iridescent as a prism in a morning room" (Carson McCullers).
ir′i·descent·ly adv.
iridescentbuprestid beetle
Sternocera sternicornis