Images
Formula: Bi2Se3
Selenide of bismuth,
tetradymite group, trigonal
paramorph of orthorhombic
guanajuatite
Crystal System: Trigonal
Specific gravity: 6.2 to 7.0 measured, 7.704 calculated
Hardness: 2½ to 3
Streak: Grey
Colour: Lead-grey
Environments
Metamorphic environments
Hydrothermal environments
Paraguanajuatite occurs intergrown with guanajuatite in
contact metamorhpic environments as well as in
hydrothermal
sulphide/arsenide/selenide veins
(Mindat, Webmin).
Localities
At the type locality, the Santa Catarina mine, Rancho Calvillo, Santa Rosa, Sierra de Santa Rosa, Guanajuato
Municipality, Guanajuato, Mexico, paraguanajuatite occurs intergrown with
guanajuatite in
contact metamorhpic environments as well as in hydrothermal
veins. Associated minerals include guanajuatite,
bismuthinite and ferroselite
(HOM).
Back to Minerals