Opal from Nkangala District Municipality, Mpumalanga, South Africa
South Africa | |
| Atanasova, M., Cairncross, B. and Windisch, W.R. (2016) Microminerals of the Bushveld Complex, South Africa. Popular Geoscience Series 6, Council for Geoscience, Pretoria, South Africa, 435 pp |
| [Opal-AN var. Hyalite] SAMS (South African Micromount Society) Datasheet ML 01-01 |