Gisement Guillemin, Besakoa, Kaominina Maromby, Distrikan'i Amboasary, Faritra Anosy, Faritanin'i Toliary, Madagasikara
Locality close to Maromby, between Andranondambo and Esiva. Behier (1960) called this locality for "gisement Guillemin."
Plagioclasites in the "Guillemin layer" contains large crystals of hibonite.
A large 8 cm (!) in diameter, platy hexagonal
hibonite crystal found here is in the collection of Musee de l'Ecole des Mines in Paris, France.
References
Behier, J. (1960): Contribution á la Minéralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p 42
Mineral List
3 entries listed. 2 valid minerals.
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