They include calaverite, sylvanite, nagyagite, petzite and krennerite.
2.
It occurs with native tellurium, rickardite, petzite and sylvanite.
3.
Petzite forms together with uytenbogaardtite ( Ag 3 AuS 2 ) and fischesserite ( Ag 3 AuSe 2 ) the uytenbogaardtite group.
4.
Weissite occurs in hydrothermal deposits associated with pyrite, native tellurium, sylvanite, petzite, rickardite, native sulfur, native gold, calaverite and krennerite.
5.
It forms, together with petzite ( Ag 3 AuTe 2 ) and fischesserite ( Ag 3 AuSe 2 ) the " uytenbogaardtite group ".
6.
Associated minerals include sylvanite, hessite, altaite, petzite, empressite, native tellurium, native gold, galena, sphalerite, colusite, tennantite and pyrite.
7.
It is a low temperature hydrothermal mineral that occurs associated with vulcanite, native tellurium, cameronite, petzite, sylvanite, berthierite, pyrite, arsenopyrite and bornite.
8.
Natural gold tellurides, like calaverite and krennerite ( AuTe 2 ), petzite ( Ag 3 AuTe 2 ), and sylvanite ( AgAuTe 4 ), are minor ores of gold ( and tellurium ).
9.
Gold sometimes occurs combined with tellurium as the minerals calaverite, krennerite, nagyagite, petzite and sylvanite ( see telluride minerals ), and as the rare bismuthide maldonite ( Au 2 Bi ) and antimonide aurostibite ( AuSb 2 ).
10.
Tellurium is sometimes found in its native ( i . e ., elemental ) form, but is more often found as the tellurides of gold such as calaverite and krennerite ( two different polymorphs of AuTe 2 ), petzite, Ag 3 AuTe 2, and sylvanite, AgAuTe 4.
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