chalcostibite

noun

chal·​co·​stib·​ite

ˌkalkōˈstiˌbīt

plural -s

: a lead-gray mineral CuSbS₂ consisting of antimony copper sulfide (specific gravity 4.75–3.0)

Word History

Etymology

German chalkostibit, from chalk- chalc- + stib- + -it -ite

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