Krennerite
![](/Images/godic/202501/22/Krennerite-1183042019.jpg")
![Krennerite in a quartz vein, Cresson Mine, Cripple Creek, Colorado. Specimen size 3.0 x 2.7 x 2.5 cm. See infobox for detail photo.](/Images/godic/202501/22/Krennerite-1183032019.jpg")
Krennerite is an orthorhombic gold telluride mineral which can contain a relatively small amount of silver in the structure. The formula is AuTe2 varying to (Au0.8,Ag0.2)Te2. Both of the chemically similar gold-silver tellurides, calaverite and sylvanite, are in the monoclinic crystal system, whereas krennerite is orthorhombic.