naumannite

noun

nau·​mann·​ite

ˈnȯməˌnīt,

ˈnau̇m-

plural -s

: a mineral (Ag₂Se) consisting of a silver selenide in iron-black cubic crystals or massive (specific gravity 8)

Word History

Etymology

German naumannit, from Karl F. Naumann †1873 German mineralogist + German -it -ite

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