chalcosiderite
noun
chal·co·sid·er·ite
¦kal(ˌ)kōˈsidəˌrīt
plural -s
: a mineral Cu(Fe, Al)6(PO4)4(OH)8.4H2O consisting of a hydrous basic green phosphate of copper, iron, and aluminum, closely related to turquoise, and containing more aluminum than iron
Word History
Etymology
German chalkosiderit from chalk- chalc- + sider- + -it -ite