9 Photos
Krennerite
Chemical Formula	AuTe2
Species	Telluride
Crystal System	Orthorhombic
Mohs Scale	2-3
Specific Gravity	8.86
Color	White to blackish yellow
Streak	greenish grey
Luster	Metallic
Diaphaneity	Opaque
Cleavage	Perfecton
Fracture	Irregular/Uneven, Sub-Conchoidal
Crystal Habit：Massive to crystalline
Geological Setting：Hydrothermal veins with tellurium.

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 (Au_0.8,Ag_0.2)Te₂. Both of the chemically similar gold-silver tellurides, calaverite and sylvanite are in the monoclinic crystal system, whereas krennerite is orthorhombic.

The color varies from silver-white to brass-yellow. It has a specific gravity of 8.53 and a hardness of 2.5. It occurs in high temperature hydrothermal environments.

Krennerite was discovered in 1877 in Sacaramb, Romania, and first described by the Hungarian mineralogist Joseph Krenner (1839–1920).