Refs.:
- Franco, R. R., Ed. (1972): Minerals of Brazil. 3 Volumes, Editora Edgard Blucher, Sao Paolo, Brazil, 426 pp. (in English and Portuguese)
- Schobbenhaus, C. (1984) Distribution of mineral deposits through geologic time in Brazil. Int. Geol. Congress, 27th. (Moscow): 289.
- Delaney, P. J. V. (1996): Gemstones of Brazil - Geology and Occurrence. 145 pp.
- A. R. Kampf & W. B. Simmons, Jr. (2000): Abstracts of the 21st Annual FM-TGMS-MSA Mineralogical Symposium: The Minerals of Brazil. Mineral. Rec. 31, 177-183.
- Toenges, W. (2008): Die "Minas Gerais" von Brasilien. Der Anschnitt 60, 66-93.
