devillite
noun
de·vil·lite
dəˈvēˌlīt,
-viˌ-
plural -s
: a mineral Cu4Ca(SO4)2(OH)6.3H2O consisting of a hydrous basic sulfate of copper and calcium found in Cornwall and elsewhere in dark green 6-sided platy crystals
Word History
Etymology
French devilline devillite (from Henri Étienne Sainte-Claire Deville †1881 French chemist + French -ine) + English -ite