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olivenite

noun
oliv·​en·​ite | \ōˈlivəˌnīt, ˈäləvəˌ-\
plural -s

Definition of olivenite 

: a mineral Cu2(AsO4)(OH) consisting of a basic arsenate of copper that is olive green, dull brown, or yellowish in color

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History and Etymology for olivenite

German olivenit, from olive (from Latin oliva) + -it -ite

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