Alabandite

alabandite

chalcopyrite

galena

acanthite

Images

Formula: MnS
Sulphide, galena group, manganese-bearing mineral
Specific gravity: 4.0 to 4.1
Hardness: 3½ to 4
Streak: Green
Colour: Black, tarnishing to brown
Common impurities: Fe,Mg,Co
Environments

Hydrothermal environments
Meteorites

Alabandite occurs in epithermal polymetallic sulphide veins and especially in low-temperature manganese deposits (HOM). It is an accessory mineral in some enstatite chondrodites (Dana). In hydrothermal veins it is commonly associated with galena, chalcopyrite, sphalerite, pyrite, acanthite, rhodochrosite, calcite, rhodonite and quartz (HOM, R&M 86.6.530-535).

At Broken Hill, New South Wales, Australia, alabandite is associated with calcite, baryte, pyrite, chabazite and sulphur.

At the Uchacchacua mine, Lima Department, Peru, alabandite is associated with fluorite, proustite and rhodochrosite (R&M 86.6.530-535).

At the Sunnyside mine, San Juan County, Colorado, USA, alabandite is associated with friedelite and alleghanyite (R&M 86.6.530-535).

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