ceruleite

noun

ce·​ru·​le·​ite

sə̇ˈrülēˌīt

plural -s

: a mineral CuAl₄(AsO₄)₂(OH)₂.4H₂O consisting of a hydrous copper aluminum arsenate occurring in turquoise-blue microcrystalline masses (specific gravity 2.80)

Word History

Etymology

French céruléite, from cérulé cerulean (from Latin caeruleus) + -ite

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