Grandidierite
Grandidierite
Grandidierite

Grandidierite

€160,00

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SKU: B060
Behara, Amboasary South District, Anosy, Madagascar
Medium-sized grandidierite of excellent blue-green color with several good crystal faces
5.3 x 2.4 x 2.4 cm
26.3 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.