Grandidierite
Grandidierite
Grandidierite

Grandidierite

€150,00

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SKU: B057
Behara, Amboasary Sud District, Anosy, Madagascar
A few grandidierite crystals protrude into a small crevice.
6.5 x 5.3 x 4.4 cm
149.0 g

Grandidierite is a rare orthohombic nesosilicate that, in addition to SiO4, also consists of 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 a greener color of grandidierite. Crystals with terminal faces are rarely found.