Specific gravity: 4.4
Colour: Steel grey to iron black
Solubility: Slightly soluble in nitric acid
Enargite is a comparatively rare mineral, found in vein and replacement deposits formed at moderate temperatures
associated with pyrite,
Enargite occurs in arsenic containing copper ore veins.
At the Gregory mine, Ashover, Derbyshire, England, UK, enargite has been found with calcite (RES p103).
Common impurities: Sb,Fe,Pb,Zn,Ag,Ge
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