(Tsaramanga (Tongafeni; Itongafeno), Kaominina Mahaiza, Distrikan' i Betafo, Faritra Vakinankaratra, Faritany Antananarivo, Madagasikara)
The Tsaramanga or the “Itongafeno” granite pegmatite is hosted in coarse grained gabbro stock ("Gabbro de l’ Itsindro”, intrusive complex of Ambatofinandrahana). It can be classified after Pezzotta (1999) as a LCT beryl columbite subtype pegmatite.
Known for blue beryl (Santamaria-type), rose quartz and good crystals of columbites.
References:
- Lacroix, A. (1912): Sur un groupe de niobotantalates cubiques, radioactifs, des pegmatites du Vakinankaratra . Bulletin de la Société française de Minéralogie, Paris 35 , 85-92 [on "blomstrandite" = betafite]
- Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871.
- Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. Extra Lapis nr 17, pp 53-54 (german edition)
Mineral List:27 entries listed. 15 valid minerals.
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