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Arfvedsonite
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| Mineral: | Arfvedsonite: NaNa2(Fe++4Fe+++)Si8O22(OH)2 | |||||
| Comments: | Prismatic crystals of black arfvedsonite in white feldspar matrix. | |||||
| Location: | Kangerdluarsuk, Ilímaussaq Massif, Greenland. | |||||
| Scale: | 8x3x3 cm. | |||||
| Copyright: | © John Betts - Fine Minerals | |||||
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