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Meaning of black opal | Babel Free

Noun CEFR B2

Definitions

A rare, precious gemstone that is dark in color and is known for its play of color.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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See also

black open access black operation black oriole black out black oven black oxide

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