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Teófilo Otoni, Mucuri valley, Minas Gerais, Brazil

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Detailed Mineral List:


Albite
Formula: Na(AlSi3O8)
Reference: dan weinrich
Beryl
Formula: Be3Al2(Si6O18)
Reference: Anthony J. Albini collection; Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Localities: Recorded from at least 1 other locality in this region.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Localities: Recorded from at least 1 other locality in this region.
Cassiterite
Formula: SnO2
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Chrysoberyl
Formula: BeAl2O4
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Chrysoberyl var: Alexandrite
Formula: BeAl2O4
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Columbite-(Fe)
Formula: FeNb2O6
Reference: dan weinrich; Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: dan weinrich
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Martins da Pedra collection
Haiweeite
Formula: Ca(UO2)2[Si5O12(OH)2] · 6H2O
Reference: [AmMin 84:198]
Iron
Formula: Fe
Reference: dan weinrich
Microcline
Formula: K(AlSi3O8)
Reference: dan weinrich
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: dan weinrich
Quartz
Formula: SiO2
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Quartz var: Amethyst
Formula: SiO2
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Quartz var: Citrine
Formula: SiO2
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Quartz var: Rutilated Quartz
Formula: SiO2
Reference: Al Sebela collection (via John Betts).
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Rutile
Formula: TiO2
Reference: No reference listed
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Juan Carlos Lodovichi; Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Proctor, K. (1984). Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), 78-100.
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Sergio Varvello collection
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