Joséite-A

joseite-A

bismuthinite

hessite

laitakarite

Images

Formula: Bi₄TeS₂
Sulphide, bismuth- and tellurium- bearing mineral
Crystal System: Trigonal
Specific gravity: 8.06 measured, 8.30 calculated
Hardness: 2
Colour: Silver-white, tarnishing lead-gray, iridescent, steel-blue to iron-black
Luminescence: Not fluorescent in UV
Environments

Hydrothermal environments

Questionable status.
Joséite-A occurs in bismuth-rich hydrothermal deposits, associated with gold, bismuth, bismuthinite, galenobismutite, hessite, cosalite, laitakarite, tetradymite and joséite-B (HOM).

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