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chalcostibite

[kal-kuh-stib-ahyt] /ˌkæl kəˈstɪb aɪt/
noun
1.
a mineral, antimony copper sulfide, CuSbS 2 , occurring in lead-gray crystals.
Origin
1865-1870
1865-70; chalco- + stib(ium) + -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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