Grandidierite
Grandidierite

Grandidierite

€19,00

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SKU: B066
Behara, Amboasary South District, Anosy, Madagascar
Nicely arranged Grandidierite crystals on some matrix.
2.0 x 1.3 x 1.3 cm
3.5 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.