Contents of “invisible” Au wt%

Ore mineral associations

Main minerals

Secondary minerals

Accessory minerals

0.07

Galena (PbS), tetrahedrite (Cu₁₂Sb₄S₁₉)

Penzhinite (AgS), antimonite (Sb₂S₃)

Sphalerite (ZnS) bismuthine (Bi₂S₃), hematite (Fe₂O₃)

0.10

Goethite (HFeO₂), native Ag, melanterite (FeSO₄∙7H₂O)

Anglesite (PbSO₄)

Chalcantite (CuSO₄∙5H₂O), goslarite (ZnSO₄∙7H₂O)

0.12

Galena, argentite (Ag₂S)

Hematite (Fe₂O₃)

Chalcopyrite (CuFeS₂), szomolnokite (FeSO₄∙H₂O)

sphalerite

0.25

Tetrahedrite, galena

Argentite, antimonite

Sphalerite, pyrite, bismuthine

0.36

Tetrahedrite, galena

Argentite, antimonite

Sphalerite, bismuthine, hematite

0.48

Argentite, stroymerite (AgCuS)

Galena

Pyrite (FeS₂), hematite

0.50

Tetrahedrite, galena, penzhinite

Antimonite

Szomolnokite, bismuthine

0.55

Tetrahedrite, penzhinite

Antimonite, galena

Szomolnokite, zincosid (ZnSO₄), bismuthine

0.69

Galena

Iocite (FeO) native Ag, plattnerite (PbO₂)

Zincite, tenorit