A deposit with lazulite-bearing metaquartzite. Ackermand et al.(2006) found a just few lazulite-bearing hand-specimens at the locality.
Ref.:
Ackermand et al. (2006): "Lazulite-bearing metaquartzite of the Itremo Group (Central Madagascar); Scientific significance and economic importance" in Proceedings of the Malagasy-German Research Cooperation in Life and Earth sciences, 5-18