Opal from Tian Shan, Asia
China | |
| Jincao Wang, Jianye Wang, Zhengrun Wang, and Ensheng Peng (2000): Geology and Prospecting 36(5), 24-26 |
| [Opal-A var. Opal-AN] Wuhan Huaze Science & Technology Development Co. Ltd., 2007 |
Tajikistan | |
| Xinjiang Tacheng International Resources Ltd. |
Uzbekistan | |
| Golovanov, I. M.: O nachodke chantita v mestorožděnii Kurgašinkan (UzSSR). Doklady Akademii nauk SSSR, 1959, tom. 124, no. 2, s. 398 - 401. |