Chemical Formula: Ag2Te
Locality: Calaveras, Nevada
Name Origin: Named after the Swiss chemist, G. H. Hesse (1802-1850).
Hessite is a mineral form of disilver telluride Ag2Te). It is a soft, dark grey telluride mineral which forms monoclinic crystals.
It is named after Germain Henri Hess (1802–1850).
Hessite is found in the USA in Eagle County, Colorado and in Calaveras County, California and in many other locations.
Stützite (Ag7Te4) and empressite (AgTe) are related silver telluride minerals.
Physical Properties
Cleavage: {100} Indistinct
Color: Lead gray, Steel gray.
Density: 7.2 – 7.9, Average = 7.55
Diaphaneity: Opaque
Fracture: Uneven – Flat surfaces (not cleavage) fractured in an uneven pattern.
Hardness: 1.5-2 – Talc-Gypsum
Luminescence: Non-fluorescent.
Luster: Metallic
Magnetism: Nonmagnetic
Streak: light gray
Photos :
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