Minerals identify

Know how to recognize them

Calaverite

Telluride mineral

Calaverite, or gold telluride, is an uncommon telluride mineral with the chemical formula AuTe2, with approximately 3% of the gold replaced by silver. It was first discovered in Calaveras County, California in 1861, and was named for the county in 1868.

The mineral 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 represent the major telluride ores of gold, although such ores are minor sources of gold in general. As a major gold mineral found in Western Australia, calaverite played a major role in the 1890s gold rushes in that area.

Identification

Color of mineral

Yellow
Silver
White

Mohs scale ( mineral hardness )

2.5
3

The streak

Grey
Yellow

Luster ( interacts light )

Metallic

Crystal ( diaphaneity )

Monoclinic