gageite
noun
gage·ite
ˈgāˌjīt
plural -s
: a mineral (Mn,Mg,Zn)8Si3O14.2(or 3?)H2O consisting of a hydrous silicate of manganese, magnesium, and zinc
Word History
Etymology
R. B. Gage, 20th century American collector of specimens in New Jersey + English -ite