Specific gravity: 5.25
Streak: Cherry red
Colour: Black with dark red internal reflections
Miargyrite occurs in hydrothermal veins of low-temperature origin, associated with baumstarkite,
polybasite, native silver,
calcite and baryte.
At the Eldorado mine, Ouray county, Colorado, USA, miargyrite is associated with polybasite, pyrargyrite and tetrahedrite.
Common impurities: As,Fe
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