Hyacinth from Soviet Union (1922-1991)
Russia | |
| Kislov, Evgeniy V., Anna V. Aseeva, Vladislav V. Vanteev, Anton Y. Sinyov, and Olga A. Eliseeva. (2022) "Naryn-Gol Creek Sapphire Placer Deposit, Buryatia, Russia" Minerals 12, no. 5: 509. https://doi.org/10.3390/min12050509 |
| Pavel.M. Kartashov (n.d.) analytical data. |