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Sturmanite, Ca6(Fe+++,Al,Mn++)2(SO4)2[B(OH)4](OH)12•25(H2O), N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa. 2.1 x 2.1 x 1.6 cm. Three, stacked, pagoda-like, hexagonal, honey-brown crystals. Copyright © Rob Lavinsky & irocks.com

Sturmanite, Ca6(Fe+++,Al,Mn++)2(SO4)2[B(OH)4](OH)12•25(H2O), N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa. 2.1 x 2.1 x 1.6 cm. Three, stacked, pagoda-like, hexagonal, honey-brown crystals. Copyright © Rob Lavinsky & irocks.com

Charlesite. N'Chwaning II Mine, Kalahari Manganese Field, Provinz Nordkap, Südafrika Taille=63 x 45 x 30 mm Copyright Dan Weinrich

Charlesite. N'Chwaning II Mine, Kalahari Manganese Field, Provinz Nordkap, Südafrika Taille=63 x 45 x 30 mm Copyright Dan Weinrich

Haussmannite on Andradite, N'Chwaning Mines, Kalahari Manganese Fields, Northern Cape Province, South Africa

Haussmannite on Andradite, N'Chwaning Mines, Kalahari Manganese Fields, Northern Cape Province, South Africa

Mineral Specimens: Sturmanite from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Mineral Specimens: Sturmanite from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Charlesite, Sturmanite, Calcite. N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa Copyright © Rob Lavinsky & irocks.com

Charlesite, Sturmanite, Calcite. N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa Copyright © Rob Lavinsky & irocks.com

Sturmanite, Ca6(Fe+++,Al,Mn++)2(SO4)2[B(OH)4](OH)12•25(H2O), Wessels Mine, Hotazel​​, Kalahari Manganese Fields, Northern Cape Province, South Africa. Orange red, transparent, hexagonal, discoidal crystals. Collection: Lithothek Munich Micromounter. Copyright : Klaus - Dieter Bausch

Sturmanite, Ca6(Fe+++,Al,Mn++)2(SO4)2[B(OH)4](OH)12•25(H2O), Wessels Mine, Hotazel​​, Kalahari Manganese Fields, Northern Cape Province, South Africa. Orange red, transparent, hexagonal, discoidal crystals. Collection: Lithothek Munich Micromounter. Copyright : Klaus - Dieter Bausch

Jouravskite, Ca3Mn4+(SO4)(CO3)(OH)6·12H2O, on calcite - Wessels mine, Kurumen, Kalahari Mn Area, Cape Province, South Africa

Jouravskite, Ca3Mn4+(SO4)(CO3)(OH)6·12H2O, on calcite - Wessels mine, Kurumen, Kalahari Mn Area, Cape Province, South Africa

Thaumasite from N�Chwaning Mine, Kalahari Manganese Field, Cape Province, South Africa [db_pics/pics/md76c.jpg]

Thaumasite from N�Chwaning Mine, Kalahari Manganese Field, Cape Province, South Africa [db_pics/pics/md76c.jpg]

Kutnohorite - Wessels Mine, Hotazel, Kalahari manganese field, Northern Cape Province, South Africa Size: 3.5 x 4.6 x 2.3 cm

Kutnohorite - Wessels Mine, Hotazel, Kalahari manganese field, Northern Cape Province, South Africa Size: 3.5 x 4.6 x 2.3 cm

Charlesite, Ca6(Al,Si)2(SO4)2[B(OH)4](OH,O)12·26H2O, N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa. Colorless translucent terminated prismatic crystals of charlesite to 1.8 cm in length are set on a 4.5 x 3.0 x 1.8 cm matrix. Copyright © Weinrich Minerals, Inc.

Charlesite, Ca6(Al,Si)2(SO4)2[B(OH)4](OH,O)12·26H2O, N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa. Colorless translucent terminated prismatic crystals of charlesite to 1.8 cm in length are set on a 4.5 x 3.0 x 1.8 cm matrix. Copyright © Weinrich Minerals, Inc.

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