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Definition of DUNITE
: a granular igneous rock consisting chiefly of olivine
— du·nit·ic\dü-ˈni-tik, ˌdə-\adjective
Origin of DUNITE
Mt. Dun, New Zealand
First Known Use: circa 1868
Yellowish green to green igneous rock composed almost entirely of olivine. Chromite and magnetite also occur in dunite, as do spinel, ilmenite, pyrrhotite, and platinum in some cases. Dunites may be a source of chromium. Places of occurrence include Dun Mtn., New Zealand (the source of its name), South Africa, and Sweden.