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Brazil | |
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| de Brito Barreto, S. and Bretas Bittar, S.M. (2010) Los depósitos de gemas de Brasil: localización, producción e impacto económico. Boletín de la Sociedad Geológica Mexicana, 62(1), 123-140.
Betts, John (n.d.) John Betts website listing.
O'Neil, Paul (1983) Planet Earth - Gemstones. Time Life Books, Alexandria, VA.
Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pages (pp. 80, 82).
Gübelin, E., Wolgensinger, M. (1976) Edelstenen. Uitgeverij Artis, Brussel [in Dutch]. |
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| Mossmann, D.J., Ehrman, J.M., Brüning, R., Semple, L., and Groat, L.A. (2009) "Skunk calcite". Mineral Paragenesis in an amethyst geode from Ametista, Rio Grande do Sul, Brazil. Mineralogical Record, 40, 121-125.
Gilg, H.A., Morteani, G., Kostitsyn, Y., Preinfalk, C., Gatter, I., and Strieder, A.J. (2003) Genesis of amethyst geodes in basaltic rocks of the Serra Geral Formation (Ametista do Sul, Rio Grande do Sul, Brazil): a fluid inclusion, REE, oxygen, carbon, and Sr isotope study on basalt, quartz, and calcite. Mineralium Deposita, 38(8), 1009-1025.
Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (pp. 82, 122). |
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| Rocks & Min.:5:131. |
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| Rocks & Min.:5:131. |
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| Sauer, Jules Roger (1982) Brazil - Paradise of Gemstones. Gemological Institute of America (GIA) |
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| Rocks & Min.:5:131. |
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| Sauer, Jules Roger (1982) Brazil - Paradise of Gemstones. Gemological Institute of America (GIA) |
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| King, Van (n.d.) Personal communcation. |
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| Email from Ricardo Fabrin and my experience in the region [Rock Currier 2009] |
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| Betts, John (n.d.) John Betts website listing.
Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (pp. 80-81). |
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| Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (pp. 70, 82).
Rocks & Minerals (xxxx) 5, 131. |
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| Lapis 29(9), 41-42 (2004) |
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| Rocks & Min.: 5:131. |
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| Rocks & Min.: 5:131. |
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| Rocks & Min.:5:131. |
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| Betts, John (n.d.) John Betts website listing. |
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| Karel Bal Collection |
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| Strieder, A. J., & Heemann, R. (2006). Structural constraints on Paraná basalt volcanism and their implications on agate geode mineralization (Salto do Jacuí, RS, Brazil). Pesquisas em Geociências. Porto Alegre, RS. Vol. 33, n. 1 (2006), p. 37-50. |
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| Sauer, Jules Roger (1982) Brazil - Paradise of Gemstones. Gemological Institute of America (GIA) |
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| Sauer, Jules Roger (1982) Brazil - Paradise of Gemstones. Gemological Institute of America (GIA) |
Ametista do Sul, Rio Grande do Sul, Brazil