chalcostibite

[ kal-kuh-stib-ahyt ]
/ ˌkæl kəˈstɪb aɪt /

noun

a mineral, antimony copper sulfide, CuSbS2, occurring in lead-gray crystals.

Origin of chalcostibite

First recorded in 1865–70; chalco- + stib(ium) + -ite1