stainierite
noun
stai·nier·ite
ˈstīnēəˌrīt,
stīˈniˌr-
plural -s
: a rare mineral CoO(OH) consisting of cobalt oxide-hydroxide and occurring in black mammillary masses
Word History
Etymology
Dutch stainieriet, from Xavier Stainier, 20th century Belgian geologist + Dutch -iet -ite