"opalesces" in the verb sense
reflect light or colors like an opal
"Distant clouds opalesce like pale brocade"
"raindrops caught in a sunbeam seem to opalesce"
exhibit a play of colors like that of an opal
"This nitrate opalesces under certain conditions"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License