| Home Page | Log In | Message Board | The Mindat Directory |
| Register | Search Pages | Chat Now! (2 online) | Mindat Auctions |
|
|
|
| |
|
Kalahari manganese fields, Northern Cape Province, South Africa Small deep yellow crystals of sturmanite among massive Mn-ore specimen. EDS showed the presence of Ca, Fe, Mn and S.Field of view is 2.65 cm. |
| © Ł Kruszewski 2007 | Photo ID: 110840 View Count: 105 |
| |
|
Kalahari manganese fields, Northern Cape Province, South Africa Sparkling glassy yellow crystals showing different habits of this rare mineral on 2 sides of a dence dark matrix (probably some kind of manganese ore) The location was just listed as South Africa but i think its safe to assume its from one of the Kalahari manganese field mines. Specimen is aprox 4.3cm tall and 4.8cm wide Jason Evans collection |
| © J.J. Evans | Photo ID: 228702 View Count: 52 |
| |
|
Black Rock Mine, Black Rock, Kalahari manganese fields, Northern Cape Province, South Africa Sturmanite crystals (medium size 2.5 mm) - close up of photo n. 32558 |
| © Marco Barsanti | Photo ID: 32561 View Count: 307 |
Sturmanite : Ca6(Fe3+,Al,Mn3+)2[(OH)12|B(OH)4|(SO4)2] · 25H2O | |
|
Black Rock Mine, Black Rock, Kalahari manganese fields, Northern Cape Province, South Africa Sturmanite psm field width 20 mm. Rui Nunes specimen and photo. |
| © Rui Nunes 2006 | Photo ID: 79992 View Count: 173 |
Sturmanite : Ca6(Fe3+,Al,Mn3+)2[(OH)12|B(OH)4|(SO4)2] · 25H2O | |
|
Black Rock Mine, Black Rock, Kalahari manganese fields, Northern Cape Province, South Africa Sturmanite crystal 1 mm diameter Photo and collection Christophe Boutry |
| © C.Boutry | Photo ID: 115073 View Count: 121 |
Sturmanite : Ca6(Fe3+,Al,Mn3+)2[(OH)12|B(OH)4|(SO4)2] · 25H2O | |
|
Black Rock Mine, Black Rock, Kalahari manganese fields, Northern Cape Province, South Africa 2.1 x 1.3 x 1 cm. Sharp yellow Sturmanites supposedly pseudomorphed after baryte. Ex. Willy Israel Collection. |
| © Rob Lavinsky | Photo ID: 174172 View Count: 73 |
Sturmanite : Ca6(Fe3+,Al,Mn3+)2[(OH)12|B(OH)4|(SO4)2] · 25H2O | |
|
Black Rock Mine, Black Rock, Kalahari manganese fields, Northern Cape Province, South Africa 3.2cm x 2.1cm x 1.2cm Purchased February 2005. Very sharp crystal structure. Largest crystal 1.6cm across, Collection of Danny Jones |
| © Danny Jones | Photo ID: 172435 View Count: 67 |
Sturmanite : Ca6(Fe3+,Al,Mn3+)2[(OH)12|B(OH)4|(SO4)2] · 25H2O | |
|
Black Rock Mine, Black Rock, Kalahari manganese fields, Northern Cape Province, South Africa Sturmanite 3mm crystal photo & collection S.Broetto |
| Photo ID: 146699 View Count: 62 | |
Sturmanite : Ca6(Fe3+,Al,Mn3+)2[(OH)12|B(OH)4|(SO4)2] · 25H2O, Gypsum : Ca[SO4] · 2H2O | |
|
Black Rock Mine, Black Rock, Kalahari manganese fields, Northern Cape Province, South Africa 2.5 x 1 x 0.5 cm. This is a fine pseudomorph. The Sturmanite, which replaces what appears to be extruded Gypsum, has a very nice color and superb luster. Ex. Willy Israel Collection. |
| © Rob Lavinsky | Photo ID: 174235 View Count: 61 |
Sturmanite : Ca6(Fe3+,Al,Mn3+)2[(OH)12|B(OH)4|(SO4)2] · 25H2O | |
|
Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa Brown crystal aggregates. 12x9 the field in photo. In my personal systematic suite. Photo Simone Citon. |
| © Simone Citon | Photo ID: 233828 View Count: 28 |
| Page 1 of 5 (1 to 10 of 47 total) | Next Page | |
| Page: 1 2 3 4 5 | ||
