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RM3369   Arfvedsonite and feldspar
NaNa2(Fe2+4Fe3+)Si8O22(OH)2
#2761
Jebel Ewargizen, Tirrhist, Anemzi, Agoudim, Midelt Cercle, Midelt Province, Drâa-Tafilalet, Morocco

Group of prismatic arfvedsonite crystals, with parallel growth, striated faces and polycrystalline terminations, shiny and dark green, almost black in color. In feldspar matrix. Nowadays it is difficult to get these samples.

Size: 3.5 x 3.3 x 3 cm.
Found in ±2011.
More info
50 €
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