gadolinite
ˈɡad(ə)lɪnʌɪt
ɡəˈdəʊlɪnʌɪt
noun
a rare dark brown or black mineral, consisting of a silicate of iron, beryllium, and rare earths.
noun
a rare dark brown or black mineral, consisting of a silicate of iron, beryllium, and rare earths.
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