having or emitting an iridescence like that of an opal
opalescence (ˌopalˈescence) noun
(Spanish) opalescente, iridiscente
iridescent, pearly, shimmering, lustrous
The glowing, greenish-yellow opalescent gemstones caught the flash of the sun from beyond the door.
Jenkins, Geoffrey A DAYSTAR OF FEAR (2002)
On a fine spring morning when the sun, which set last night in gold and purple behind the jagged mountain chain of Corsica, had but just climbed high enough to send out shafts and flashes of soft light across the opalescent sea …
Norway, Arthur H. NAPLES PAST AND PRESENT (1924)