A. Lacroix (1912) suggest that the blue tourmaline mentioned by Duparc et al(1910) is a misnomer for "manganapatite" which occured abundantly at the locality.
Colour:
blue; Prusse blue
Quality of samples:
not specified / average specimens
Rarity at site:
Common
Confirmation
Validity:
Believed Valid
References
References:
Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie 35 , 76-84