- black opal
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a dark variety of opal having the characteristic opaline play of color.
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Universalium. 2010.
black opal
Look at other dictionaries:
black opal — noun a dark colored opal with internal reflections of green or red • Hypernyms: ↑opal * * * noun : a dark colored opal showing usually red or green internal reflections * * * Mineral. a dark variety of opal having the characteristic opaline play… … Useful english dictionary
black opal — /blæk ˈoʊpəl/ (say blak ohpuhl) noun a rare variety of opal, dark, but flashing many colours when catching the light …
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opal — /oh peuhl/, n. 1. a mineral, an amorphous form of silica, SiO2 with some water of hydration, found in many varieties and colors, including a form that is milky white. 2. an iridescent variety of this that is used as a gem. 3. a gem of this. [1350 … Universalium
Opal — /oh peuhl/, n. a female given name. * * * A hydrated, noncrystalline silica mineral used extensively as a gemstone. Its chemical composition is similar to that of quartz but generally with a variable water content. Pure opal is colourless, but… … Universalium
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