Zincite

oxide

willemite

Formula: ZnO
Simple oxide
Specific gravity: 5.64 to 5.68
Hardness: 4
Streak: Orange-yellow
Colour: Red to orange, rarely yellow
Environments:

Metamorphic environments
Hydrothermal environments

Zincite is a primary mineral in metamorphosed zinc-manganese-iron oxide-silicate ore bodies in crystalline Franklin marble at Franklin and Sterling Hill, New Jersey, USA, associated with franklinite, willemite and calcite (HOM). It is also a secondary mineral altered from other zinc minerals in oxidized zinc-rich ore deposits, associated with zinc, sphalerite, smithsonite, hemimorphite and hausmannite (HOM).

Common impurities: Mn,Fe

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