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smithite

noun
smith·​ite | \ˈsmiˌthīt\
plural -s

Definition of smithite 

: a mineral AgAsS2 consisting of a silver arsenic sulfide occurring in small red monoclinic crystals (hardness 1.5–2, specific gravity 4.9)

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History and Etymology for smithite

G. F. Herbert Smith †1953 English mineralogist + English -ite

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