Garnetite in a tin-bearing skarn, formed under conditions of relatively low temperature and low (XCO2).
Andradite garnetite in limestones/shales alternations near a buried batholith. The skarns are affected by a late boron metasomatic alteration.
Localisation : Hillside on the West bank of the Beht River.
Ref.:
Ph. M. Sonnet (1981): Burtite, Calcium Hexahydrostannate, a New Mineral from El Hamman, Central Morocco. Canadian Mineralogist, 19, 397-401.
