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Brazil | |
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| Leonardo, O. H. 1936, Tantalo, Niobio, Uranio e Radio no Brasil. |
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| Cassedanne, J.P., Cassedanne, J.O. (1981). Minerals of the Lavra do Ênio Pegmatite. The Mineralogical Record, 12, 67-72. |
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| Menezes, Luiz Alberto Dias (n.d.) Personal communication. |
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| Jessica Simonoff photo |
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| Josef Vajdak (Peque Rare Minerals) specimens (JV02/101-4), labelled "Golconda/Urbano mine". |
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| [Mineralogical Record - Vol 25 No.3] |
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| Fabre, Jordi (n.d.) Personal communication. |
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| Ricardo Scholz |
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| Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
dan weinrich |
Faria claim, Golconda mining district, Governador Valadares, Minas Gerais, Brazil