Grandidierite
Grandidierite
Grandidierite

Grandidierite

€48,00
SKU: A796
Behara, Amboasary Sud District, Anosy, Madagascar
Dark blue-green specimen in which several grandidierite crystals are quite attractively intergrown.
4.0 x 3.0 x 2.7 cm
28.1 g

Grandidierite is a rare orthorhombic crystallizing nesosilicate, consisting of both SiO4 and BO3 elements (a borosilicate). This greenish-blue mineral is relatively hard (Mohs = 7.5), mostly opaque, and rarely translucent or transparent. A higher iron content results in a greener color of the grandidierite. End-faced crystals are rare.