Jasper from Peru
Peru | |
| Lewis Jr, R. W. (1964). The geology, mineralogy and paragenesis of the Castrovirreyna lead-zinc-silver deposits, Peru (OFR No. 64-103). US Geological Survey,. |
| Hyrśl, Jaroslav (2012) Gemstones of Peru. Granit. |
| Hyrśl, Jaroslav (2012) Gemstones of Peru. Granit. |
| Alvarez A, A., & Noble, D. C. (1988). Sedimentary rock-hosted disseminated precious metal mineralization at Purisima Concepcion, Yauricocha district, central Peru. Economic Geology, 83(7), 1368-1378. |
| Hyrśl, Jaroslav (2012) Gemstones of Peru. Granit. |