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omphacite

noun
om·​pha·​cite | \ˈäm(p)fəˌsīt\
plural -s

Definition of omphacite 

: a mineral consisting of a grass-green granular or foliated pyroxene found in the rock eclogite

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History and Etymology for omphacite

German omphazit, from Greek omphakitēs green stone, from omphak-, omphax unripe grape + -itēs -ite

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