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October 24, 2014

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Skutterudite, Calcite, Arsenopyrite

Locality: Bouismas Mine (Bouismass mine), Bouismas (Bouismass), Bou Azer District (Bou Azzer District), Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco

Posted by: Iván Blanco (PDM)

Highly lustrous and well formed cuboctahedron crystals where the octahedron {111} is dominant over the cube {100}. Smaller faces of rhombic dodecahedron {101} truncate the cuboctahedron. The crystal are very aereal and the paragenesis is completed with extremely bright arsenopyrite and calcite (strongly fluorescent in red colour under long UV lamp). The specimen does also show the classical effect of tectonic presure on these arsenides from the Bou-Azzer distric. Pressure opened fractures in the skutterudite but not in the silicate-rich matrix, that react more ductile. It is from the famous ...

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