Mineralpedia Details for Tetrahedrite
Named after its commonly tetrahedral crystals, Tetrahedrite occurs “in hydrothermal veins or contact metamorphism deposits of low to medium temperature of formation.” One of the most common sulfosalts, Tetraherite is found in thousands of localities worldwide.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/tetrahedrite.pdf
Tetrahedrite from Grube George, Horhausen, Rhineland - Pfalz, Germany
Tetrahedrite from Herodsfoot mine, Liskeard, Cornwall, England
Tetrahedrite from Schwaz, Brixlegg, Tyrol, Austria
Large dull grey cubo-octahedral crystals to over 1cm. Originally called "Schwatzite" having originated from the Schwaz, Brixlegg - Schwaz area in Tyrol.
Tetrahedrite from Wiemannsbucht, Bad Grund, Harz, Lower Saxony, Germany
There are two Tetrahedrite crystals, the best to 6m, on this specimen with mostly mal-formed Galena and some Siderite.
Tetrahedrite from Casapalca, Lima Dept., Peru
Rich specimen loaded with tetragonal crystals of dark steely grey Tetrahedrite to about 1cm on a matrix of Sphalerite.