Calaverite
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Calaverite, or gold telluride, is an uncommon telluride of gold, a metallic mineral with the chemical formula AuTe2, with approximately 3% of the gold replaced by silver. It was first discovered in Ca
Platy calaverite crystals on matrix from the Cripple Creek District (size: 6 x 5 x 3.5 cm)
Calaverite from the Cresson Mine, Cripple Creek, Colorado. Largest crystal is 9 mm
Sylvanite
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Sylvanite or silver gold telluride, chemical formula Te2, is the most common telluride of gold.
Calaverite
…often has a metallic luster, and its color may range from a silvery white to a brassy yellow. It is closely related to the gold-silver telluride mineral sylvanite, which, however, contains significantly more silver. Another AuTe2 mineral (but with a quite different crystal structure) is krennerite. Calaverite and…
Sylvanite from the Cripple Creek mining district