Grandidierite
Grandidierite
Grandidierite

Grandidierite

€110,00

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SKU: B059
Behara, Amboasary Sud District, Anosy, Madagascar
This specimen is half composed of a grandidierite layer. Several excellent crystal faces form the walls of a cavity.
5.9 x 4.6 x 3.7 cm
94.7 g

Grandidierite is a rare orthohombic nesosilicate that consists of both SiO4 and BO3 elements ("borosilicate"). The greenish-blue mineral is relatively hard (Mohs=7.5), mostly opaque, more rarely translucent or transparent. A higher iron content causes grandidierite to have a greener color. Crystals with terminal faces are rarely found.