quenselite
noun
quen·sel·ite
ˈkwen(t)sᵊlˌīt
plural -s
: a mineral PbMnO2(OH) consisting of basic lead manganese oxide and occurring in black monoclinic crystals
Word History
Etymology
Swedish quenselit, from Percy D. Quensel, born 1881 Swedish mineralogist + Swedish -it -ite