opalescent

Showing varying colors like an opal; having a milky iridescence.

• opalescence/ˌoʊpəˈlɛsəns/(n)乳光
• opalesce/ˌoʊpəˈlɛs/(v)发乳光

• opalescent sheen
• opalescent glass
• opalescent sky
• opalescent surface

1. 1.The opalescent shell shifted between pink, green, and blue as she turned it in the light. (iridescent colors)
2. 2.The dawn sky was opalescent — a soft wash of pearly white and pale rose. (milky, luminous)

• iridescent/ˌɪrɪˈdɛsənt/— showing rainbow colors
• pearlescent/ˌpɜːrlˈɛsənt/— pearl-like sheen
• nacreous/ˈneɪkriəs/— mother-of-pearl, very formal

from Latin "opalus" (opal, the gemstone) — opal + -escent (becoming) — becoming opal-like