Aramayoite

aramayoite

tetrahedrite

miargyrite

stannite

Images

Formula: Ag₃Sb₂(Bi,Sb)S₆
Sulphosalt, silver-, antimony- and bismuth- bearing mineral
Crystal System: Triclinic
Specific gravity: 5.602 measured, 5.624 calculated
Hardness: 2½
Streak: Black
Colour: Iron-black, deep red in transmitted light
Common impurities: Cu,Fe
Environments

Hydrothermal environments

Aramayoite is a rare mineral, typically occurring in vein-controlled hydrothermal tin-silver ores. Associated minerals include tetrahedrite, miargyrite, stannite, pyrite and quartz (HOM).

Localities

At the type locality, the Ánimas Mine, Chocaya-Animas mining district, Atocha Municipality, Sud Chichas Province, Potosí, Bolivia, aramayoite occurs in hydrothermal silver tin ores as an irregular and confused aggregate of bright cleavage surfaces with striated areas at the edges, similar to 'books' of mica. Associated Minerals include pyrite and tetrahedrite subgroup minerals (Mindat).
Aramayoite from the Ánimas Mine - Image

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