1. Gold sometimes occurs combined with tellurium as the minerals calaverite, krennerite, nagyagite, petzite and sylvanite (see telluride minerals), and as the rare bismuthide maldonite (Au2Bi) and antimonide aurostibite (AuSb2).

2. 15 There are a lot of tellurium minerals in them, such as petzite, calaverite, hessite, altaite , tellurbismuth, rucklidgeite and sylvan. The grade of some section of ore body is up to industrial grade.