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Jacobsite : Mn2+Fe3+2O4 | |
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Iron Monarch open cut, Iron Knob, Middleback Range, Eyre peninsula, South Australia, Australia Really sharp, bright to matte-finish jacobsite crystals to 2mm set in a vug in matrix from a famous location for jacobsite, Iron Knob, South Australia. Rare spinel group mineral. 2.5 x 2.1 x 1.9 cm |
| © Rob Lavinsky | Photo ID: 20502 View Count: 542 |
Jacobsite : Mn2+Fe3+2O4 | |
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Iron Monarch open cut, Iron Knob, Middleback Range, Eyre peninsula, South Australia, Australia Jacobsite crystals, obtained in August 1984. Alan Goldstein specimen (#5030) and photo. FOV = 5 mm |
| © Alan Goldstein | Photo ID: 48997 View Count: 382 |
Jacobsite : Mn2+Fe3+2O4 | |
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Friedlkogel Mt., Kaiblinggraben, Kleinveitsch, Veitsch, Mitterdorf, Styria, Austria Massive (analysed) Jacobsite in Mn ore; FOV 13mm; Chris Auer photo and collection, self collected in 2005 |
| Photo ID: 137698 View Count: 206 | |
Jacobsite : Mn2+Fe3+2O4 | |
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In den Dellen quarries, Niedermendig, Mendig, Laach lake volcanic complex, Eifel Mts, Rhineland-Palatinate, Germany Jacobsite, octahedral crystal on Sanidine, field of view 3 mm, collected 1985, photographer Markus Schäfer, collection C.&H. Schäfer |
| © C.H.M.-Schäfer | Photo ID: 43375 View Count: 459 |
Jacobsite : Mn2+Fe3+2O4 | |
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Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa Jacobsite is described in the Cairncross book Manganese Adventure as being very rare and only seldom occurring as small sub-mm octohedral crystals in protected vugs. THESE, however, are freestanding, SHARP, lustrous crystals to 3 mm in size aethetically arranged on a contrasting matrix of lizardite and minute garnets! 6 x 4 x 3 cm |
| © Rob Lavinsky | Photo ID: 21334 View Count: 456 |
Jacobsite : Mn2+Fe3+2O4 | |
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Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa JACOBSITE. Vasco Trancoso collection. Size: miniature, 5 x 4 x 3.25 cm. Ex. Charlie Key. BRIGHT crystals to 6mm!!! Very sharp, lustrous and huge for species...Good overall quality. Additionally, for both isolation and aesthetics, this is a superior miniature display specimen of the species. One the finest examples of this mineral from Kalahari ... |
| Photo ID: 183609 View Count: 231 | |
Jacobsite : Mn2+Fe3+2O4 | |
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Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa dimension area mm. 8 x 8 photo and collection Luigi Chiappino |
| © luigi chiappino | Photo ID: 211535 View Count: 160 |
Jacobsite : Mn2+Fe3+2O4 | |
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N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa This specimen is the largest and richest jacobsite I have ever had to offer, far more rich than anything that I had back 5 years or so when i handled much of the Von Bezing collection or more recently part of the Charlie Key kalahari collection. It is almost completely covered in jet-black, lustrous, SHARP octohedral jacobsites, and glitters with ... |
| © Rob Lavinsky | Photo ID: 41760 View Count: 470 |
Jacobsite : Mn2+Fe3+2O4 | |
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Jakobsberg Mine, Nordmark, Filipstad, Värmland, Sweden Black crystals of Jacobsite. Picture size 3 mm. Photographer and collection Thomas Witzke. |
| © Thomas Witzke | Photo ID: 13329 View Count: 1068 |
Jacobsite : Mn2+Fe3+2O4 | |
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Jakobsberg Mine, Nordmark, Filipstad, Värmland, Sweden About a 0.3 cm field of view, vertical. Small rounded jacobsite crystals in matrix. S411-147 Excalibur Mineral specimen. |
| © 2009, JGW | Photo ID: 253152 View Count: 21 |
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