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Sturmanite
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| Mineral: | Sturmanite: Ca6(Fe+++,Al,Mn++)2(SO4)2[B(OH)4](OH)12ยท25(H2O) | ||||
| Comments: | Sharply terminated dark yellowish crystal of sturmanite with a few lesser crystals attached to one side. | ||||
| Location: | N'Chwaning mine, Kalahari Manganese Field, Northern Cape Province, South Africa. | ||||
| Scale: | 17 x 10 x 16 mm. | ||||
| Copyright: | © Dan Weinrich | ||||
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