neptunite

noun

nep·​tun·​ite

-ˌnīt

plural -s

: a mineral (Na,K)₂(Fe,Mn)TiSi₄O₁₂ consisting of a silicate of iron, manganese, potassium, sodium, and titanium

Word History

Etymology

Swedish neptunit, from Latin Neptunus Neptune + Swedish -it -ite

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