Calaverite Mineral Information photos and Facts, Telluride ...
It is believed to have been deposited by ascending magmatic water at comparatively low temperatures. Other rare tellurides belonging to this group are, sylvanite, hessite (Ag2Te) and petzite (Au,Ag2Te), krennerite, AuTe2, and nagyagite, a sulphotelluride of lead and gold. Historically, calaverite has been as important ore of gold.