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Pronunciation varies by accent · noun
(mineralogy) An isometric-hexoctahedral black mineral containing aluminum, iron, and oxygen..
Use hercynite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Hercynite means (mineralogy) An isometric-hexoctahedral black mineral containing aluminum, iron, and oxygen..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use hercynite where its definition matches the intended context.
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