Schiavinatoite, Tourmaline
Thumbnail, 2.8 x 2.0 x 1.7 cm
Antsongombato gem mine, FKT Antsentsindrano, Andrembesoa Commune, Betafo District, Vakinankaratra Region, Antananarivo Province, Madagascar
This borate is the niobium analogue of Behierite. This is a good example of this incredibly rare species. It features a partial crystal of Schiavinatoite measuring up to 8 mm on contrasting pink Tourmaline matrix. 2.8 x 2.0 x 1.7cm