Quartz from selected localities.
Namibia | |
| [var: Chalcedony] Cairncross, B. (2004): Field Guide to Rocks & Minerals of Southern Africa. Struik Publishers, Cape Town, South Africa, 292 pp. |
| Mining Ann. Review(1985):423. |
Namibia | |
| [var: Chalcedony] Cairncross, B. (2004): Field Guide to Rocks & Minerals of Southern Africa. Struik Publishers, Cape Town, South Africa, 292 pp. |
| Mining Ann. Review(1985):423. |