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Russia | |
| Am. Min. 90:1402-1412 (2005) Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp. |
| Pavel.M. Kartashov (n.d.) analytical data. |
| Galina Gubko, Natalia Levtsova (2009) Blyum Pit in the Ilmeny Mountains. Fifth International Symposium Mineral Diversity Research and Preservation pp59-64 Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp. Pavel.M. Kartashov (n.d.) analytical data. |
| Sorokina, E. S., Koivula, J. I., Muyal, J., Karampelas, S., Nishanbaev, T. P., & Nikandrov, S. N. (2016). Multiphase fluid inclusions in blue sapphires from the Ilmen Mountains, southern Urals. Gems & Gemology, 52(2), 209-211. |
Pit No. 50, Ilmen Mountains, Chelyabinsk Oblast, Russia