chalcomenite
noun
chal·co·me·nite
ˌkalkəˈmēˌnīt
plural -s
: a mineral CuSeO3.2H2O consisting of copper selenite and occurring in blue crystals
Word History
Etymology
French chalcoménite, from chalc- + Greek mēnē moon + French -ite; from its being a compound of selenium, which is named for the moon