Quartz from Val Val, Tujetsch, Surselva Region, Grisons, Switzerland
Switzerland | |
| [var. Smoky Quartz] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 302. |
Switzerland | |
| [var. Smoky Quartz] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 302. |
Val Val, Tujetsch, Surselva Region, Grisons, Switzerland