hauerite
noun
hau·er·ite
ˈhau̇əˌrīt
plural -s
: a mineral MnS2 consisting of native manganese sulfide and occurring as reddish brown or brownish black octahedral or pyritohedral crystals or massive (specific gravity 3.46)
Word History
Etymology
German hauerit, from Franz von Hauer †1899 Austrian geologist + German -it -ite