nacreous

/ˈneɪkriəs/
adjective
  1. Having the lustrous, pearly appearance of nacre; iridescent.
    • Her dress had a nacreous sheen that changed from pink to green as she moved.
    • The nacreous clouds glowed with soft pastel colors at sunset.
    • The nacreous finish on the guitar made it look like it was made of mother-of-pearl.
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