copiapite
noun
co·pi·a·pite
ˈkōpēəˌpīt
plural -s
: a mineral composed of a basic iron sulfate (Fe,Mg)Fe4(SO4)6(OH)2.20H2O, of yellow color and metallic taste (hardness 2.5, specific gravity 2.10)
Word History
Etymology
German copiapit, from Copiapó, Chile, its locality + German -it -ite