Description
Plentiful blue Dumortierite, a fairly rare borosilicate, in matrix from the Malagasy Tsiambenana Quarry in the central highland of Madagascar, where a ca. 300 m thick horizon of fine-grained Lazulite-Tourmaline-Dumortierite-bearing metaquartzite is exposed. This specimen is from the collection of Erberto Teladi (1934–1996), the former editor of the Italian mineral magazine Rivista Mineralogica Italiana, and comes with his original label.