A beryl and phosphate bearing pegmatite worked for beryl and columbite-tantalite, located 10 km N of Ampandramaika. Over 100 kgs large masses of triplite with many other phospates was found here
References:
- Behier, J.(1957): Les mineraux phospates de la pegmatite de Marivolanitra, Madagascar. in Commision de Coopération Technique en Afrique au Sud du Sahara (C.C.T.A.). Geologie. Comités regionaux Centre, Est et Sud. Conférence de Tananarive Avril 1957. I, 237-242
- Besaire, H. (1966): Gites mineraux de Madagascar. Annales Géologiques de Madagascar XXXIV,Tananarive. p 62
- Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. 78p
Mineral List:29 entries listed. 25 valid minerals.
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