Béhierite
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
This rare earth Borate is the Tantalum analogue of Schiavinatoite. This example features a few small, sharp, well formed, brownish colored pseudo-octahedra of Behierite on pegmatite matrix. There are very few rare earth Borates in the mineral world. 3.8 x 3.3 x 2.6cm
© Rob Lavinsky & irocks.com