Minerals identify

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Nagyágite

Sulfosalt mineral

Nagyágite (Pb)4S with known occurrence associated with gold ores. Nagyágite crystals are opaque and dark grey to black coloured.

It was first described in 1845 for an occurrence at the type locality, Hunedoara County

It occurs in gold–tellurium epithermal hydrothermal. Minerals associated with nagyágite include: altaite , sylvanite , coloradoite, native gold, proustite , arsenopyrite, calaverite , galena

Identification

Mohs scale ( mineral hardness )

1.5

The streak

Grey

Crystal ( diaphaneity )

Monoclinic