Grandidierite
Grandidierite
Grandidierite

Grandidierite

€85,00

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SKU: B055
Behara, Amboasary South District, Anosy, Madagascar
Many slender Grandidierite crystals, intergrown in a reticulated pattern, form a thin layer on a rock-like matrix.
6.8 x 5.8 x 3.4 cm
112.0 g

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