Specific gravity: 5.64 to 5.68
Colour: Red to orange, rarely yellow
Common impurities: Mn,Fe
Zincite can be a primary mineral in metamorphic environments.
It is also a secondary mineral altered from other
minerals in oxidised zinc-rich ore deposits, associated with zinc,
smithsonite, hemimorphite and
There are two co-type localities, the Franklin mine, Franklin, and the Sterling Mine, Sterling Hill, Ogdensburg, both at the Franklin Mining District, Sussex County, New Jersey, USA. Here zincite is a primary mineral in metamorphosed zinc-manganese-iron oxide-silicate ore bodies in crystalline Franklin marble, associated with franklinite, willemite and calcite (HOM, Mindat).
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