enargite

noun

en·​ar·​gite

ə̇ˈnärˌjīt,

ˈenər-

plural -s

: a grayish black or iron-black copper arsenic sulfide (Cu₃AsS₄) of metallic luster occurring in small orthorhombic crystals or massive and often containing antimony

Word History

Etymology

German enargit, from Greek enargēs visible (from en in + argēs bright) + German -it -ite; from its cleavage; akin to Greek argos white

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