Guanajuatite

guanajuatite

bismuth

bismuthinite

clausthalite

Images

Formula: Bi2Se3
Selenide, stibnite group, paramorph of paraguanajuatite, bismuth-bearing mineral
Specific gravity: 6.25 to 6.98
Hardness: 2½ to 3
Streak: Shiny grey
Colour: Bluish grey
Common impurities: S
Environments

Hydrothermal environments

Guanajuatite occurs in hydrothermal deposits of low to medium temperatures. Associated minerals include bismuthinite, bismuth, clausthalite, nevskite, galena, pyrite and calcite (HOM).

Localities

The type locality is the Santa Catarina mine, Rancho Calvillo, Santa Rosa, Sierra de Santa Rosa, Guanajuato Municipality, Guanajuato, Mexico.

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