en·ar·gite
| \ ə̇ˈnärˌjīt, ˈenər- \
plural -s
Definition of enargite
: a grayish black or iron-black copper arsenic sulfide (Cu3AsS4) of metallic luster occurring in small orthorhombic crystals or massive and often containing antimony
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Merriam-Webster unabridged
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