Nagyágite

nagyagite

altaite

petzite

stutzite

Images

Formula: [Pb3(Pb,Sb)3S6](Au,Te)3
Sulphide, antimony- and tellurium- bearing mineral
Specific gravity: 7.35 to 7.49
Hardness: 1 to 1½
Streak: Blackish lead-grey
Colour: Black-grey
Luminescence: None under UV light
Common impurities: Ag,Fe,Bi
Environments

Hydrothermal environments

Nagyágite occurs in gold-tellurium epithermal hydrothermal veins. Common associates include altaite, calaverite, galena, gold, pyrite and tellurobismuthite (Mindat).

Localities

At the Bohuliby deposit, Bohuliby, Petrov, Prague-West District, Central Bohemian region, Czech Republic, nagyágite occurs as lamellar subhedral crystals in intimate intergrowth with buckhornite in a quartz gangue containing pyrite, tellurobismuthite, altaite, galena, calaverite and native gold (AM 80.188).

At the type locality, Săcărâmb, Certeju de Sus, Hunedoara, Romania, nagyágite is associated with altaite, petzite, stützite, sylvanite, tellurantimony, coloradoite, krennerite, arsenic, gold, proustite, rhodochrosite, arsenopyrite, sphalerite and tetrahedrite (HOM).

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