Corundum from Tian Shan, Asia
China | |
| [var. Ruby] Yanling Tang (2005): Non-metallic deposits of Xinjiang, China [Zhongguo Xinjiang Fei Jinshu Kuangchuang]. Geological Publishing House (Beijing), 289 pp. |
Kyrgyzstan | |
| |
| [var. Sapphire] Kievlenko, Eugenii Ya., Soregaroli, A. - Ed. (2003) Geology of Gems - First English Edition. Ocean Pictures Ltd, Littleton, Colorado. p.1-468. |