cesarolite
noun
ce·sa·ro·lite
ˌchāzəˈrōˌlīt
plural -s
: a mineral H2PbMn3O8 occurring in spongy steel-gray masses and supposed to be a hydrous lead manganate (hardness 4.5, specific gravity 5.3)
Word History
Etymology
French, from G.R.P.Cesaro †1939 Italian-Belgian mineralogist + French -lite