Il nome tetraedrite è usato per un'intera famiglia di minerali, detti anche rami grigi, che comprende la tennantite, la freibergite (con piccole quantità di argento), la schwatzite (con piccole quantità di mercurio), l'annivite (con piccole quantità di bismuto), la frigidite (con ferro), e la sandbergerite (con zinco).[2]
Massivo, granulare.[1]
Genesi idrotermale a temperatura medio-bassa[1][2] associata a minerali di rame, piombo, zinco ed argento.[2]
La tetraedrite è solubile in acqua regia.[3]
In masse grigie, in cristalli tetraedrici.[3]
Splendidi cristalli si possono trovare a Botes e Kapnik (Romania), a Boliden (Svezia), Pribram (Repubblica Ceca), Tsumeb (Namibia) e Butte (Montana, USA); per le varietà argentifere Schwaz (Austria). Altre importanti luoghi di ritrovamento sono: Bolivia, Perù, Cornovaglia, Nevada, Nuovo Messico, Arizona e California. In Italia è rara e segnalata nelle miniere del Sarrabus (Sardegna), in Toscana, nelle miniere di Brosso (Piemonte) e in alcune miniere del Trentino-Alto Adige.
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