boulangerite

[ boo-lan-juh-rahyt ]
/ buˈlæn dʒəˌraɪt /

noun

a bluish lead-gray mineral, lead antimony sulfide, Pb5Sb4S11, a minor ore of lead.

Origin of boulangerite

named after C. L. Boulanger (1810–49), French mining engineer; see -ite1