black opal

n (Geological Science) any opal of a dark coloration, not necessarily black

Thesaurus

Noun

black opal - a dark colored opal with internal reflections of green or redopal - a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones

black opal

[¦blak ′ō·pəl] (mineralogy) A variety of gem-quality opal displaying internal reflections against a dark background.

black opal

noun

Words related to black opal

noun a dark colored opal with internal reflections of green or red

Related Words

opal

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