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benjaminite

noun
ben·ja·min·ite | \ˈben-jə-mə-ˌnīt\
plural -s

Definition of benjaminite 

: a mineral Pb (Cu, Ag) Bi2S4 consisting of sulfobismuthite of lead, silver, and copper occurring in gray masses

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History and Etymology for benjaminite

Marcus Benjamin †1932 American museum official + English -ite

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nary

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