Kolicite

arsenate

willemite

Formula: Zn4Mn2+7(AsO4)2(SiO4)2(OH)8
Compound arsenate
Specific gravity: 4.17
Hardness: 4½
Streak: Pale orange
Colour: Orange
Environments:

Metamorphic environments

Kolicite is rare at the type locality, the Sterling Mine, New Jersey, USA, where it has been found in a marble-hosted zinc oxide and zinc silicate orebody, associated with willemite, holdenite, franklinite, calcite, (Mindat) sonolite and friedelite (HOM, AM64.708).

Common impurities: Fe,Mg,H2O

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