nagatelite
noun
nag·a·tel·ite
ˌnagəˈteˌlīt
plural -s
: a rare mineral Ca2(Ce,La)2Al4Fe2(Si,P)6O25(OH)(?) that consists of phosphosilicate of aluminum, the rare earths, calcium, and iron, that is related to clinozoisite, and that occurs in black tabular masses
Word History
Etymology
Nagatejima, headland on the Noto peninsula, Japan + English -lite