Tetrahedrite Subgroup from Johkoku mine (Jôkoku mine; Jokoku mine), Kaminokuni, Hiyama District, Hiyama Subprefecture, Hokkaidō Prefecture, Japan
Japan | |
| [var. Silver-bearing Tetrahedrite] Ishiyama, D. et al (1982) Journal of the Mining College, Akita University, Ser. A, Mining Geology, 6, #2, 149-171. |