K Feldspar from Indian Ocean
Indian Ocean | |
| D. Besse et al. , Bell. Minéral. , 1981, 104, pp. 56-63. |
Madagascar | |
| Grew, Edward S., Yates, Martin G., Huijsmans, Joep P. P., McGee, James J., Shearer, Charles K., Wiedenbeck, Michael, Rouse, Roland C. (1998) Werdingite, a borosilicate new to granitic pegmatites. The Canadian Mineralogist, 36 (2) 399-414 |