Quartz from Xiaozhangjiakou gold field, Xuanhua District, Zhangjiakou, Hebei, China
China | |
| Laisheng Shi, Yuxue Rao, Ruixian Song, and Jianhua Wen (2007): Mineral Resources and Geology 21(3), 219-227 |
[var. Chalcedony] Yishan Zeng, and Jiaqui Liu (2000): Applied Geochemistry 15, 13-25 Zhengkun Wang, Xinming Jiang, Yu Wang, and Muyuan Shang (1992): Geology and Prospecting 28(7), 14-20 |