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Roger Lang's Photo Gallery

1HJ-FN1Pyrrhotite : Fe7S8

East Geduld Mine, Springs, Ekurhuleni District, Witwatersrand field, Gauteng Province, South Africa

Dimensions: 16 mm x 16 mm x 5 mm

From the Prof. Dr. Hofmeister (GER) collection: almost textbook-like pyrrhotite crystal (one of a pair) from East Geduld mine. Nice typical tombak/bronze metallic lustre with some slight irridescent colours.
Copyright: © R. Lang 2018      Photo ID: 900243     Uploaded by: Roger Lang   View Count: 95   Approval status: Public galleries    Type: Photo - 1250 x 946 pixels (1.2 Mpix)

XQU-149Sadanagaite : {Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2, Graphite : C, Corundum (Var: Ruby) : Al2O3, Phlogopite : KMg3(AlSi3O10)(OH)2, Pyrrhotite : Fe7S8

Multiple photos available
Luc Yen, Yenbai Province, Vietnam

Dimensions: 116 mm x 45 mm x 50 mm

From the collection of Prof. Dr. Wolfgang Hofmeister comes this specimen consisting of white marble hosting pink ruby, black graphite flakes, some bronze coloured pyrrhotite, brown phlogopite and small aggregates of a translucent brown mineral that was analyzed and found to be Sadanagaite (originally as Magnesiosadanagaite, but this is classified in the Amphibole nomenclature as Sadanagaite since 2012). At one side of the specimen a slice was sawn off, this was one of the analyzed samples described in Hauzenberger, C.A., Walter, F., Hofmeister, W., Phan Tien, D. & Kienzl, N. (2005): Mineralogical, petrological and crystallographic investigations of two amphiboles from ruby and spinel bearing marbles, Luc Yen, Province Yen Bai, Vietnam.
Copyright: © R. Lang 2018      Photo ID: 899919     Uploaded by: Roger Lang   View Count: 31   Approval status: Public galleries    Type: Photo - 2500 x 1810 pixels (4.5 Mpix)

Fortuna Mine underground, 2016

Fortuna Mine, Oberbiel, Wetzlar, Hesse, Germany

Copyright: © Roger Lang      Photo ID: 834538     Uploaded by: Roger Lang   View Count: 40   Approval status: Public galleries    Type: Photo - 1500 x 975 pixels (1.5 Mpix)

Fortuna Mine underground, 2016

Fortuna Mine, Oberbiel, Wetzlar, Hesse, Germany

Copyright: © Roger Lang      Photo ID: 834535     Uploaded by: Roger Lang   View Count: 30   Approval status: Public galleries    Type: Photo - 1500 x 1000 pixels (1.5 Mpix)

Fortuna Mine underground, 2016

Fortuna Mine, Oberbiel, Wetzlar, Hesse, Germany

Copyright: © Roger Lang      Photo ID: 834532     Uploaded by: Roger Lang   View Count: 40   Approval status: Public galleries    Type: Photo - 1500 x 1000 pixels (1.5 Mpix)

Fortuna Mine underground, 2016

Fortuna Mine, Oberbiel, Wetzlar, Hesse, Germany

Copyright: © Roger Lang      Photo ID: 834529     Uploaded by: Roger Lang   View Count: 32   Approval status: Public galleries    Type: Photo - 1500 x 1000 pixels (1.5 Mpix)

Flos Ferri in situ, 2017

Pfingstwiese Mine, Bad Ems, Bad Ems District, Lahn valley, Rhineland-Palatinate, Germany

Aragonite var Flos Ferri in situ in the galleries of the Pfingstwiese Mine. Picture taken in 2017.
Copyright: © Roger Lang      Photo ID: 834516     Uploaded by: Roger Lang   View Count: 38   Approval status: Public galleries    Type: Photo - 1500 x 1041 pixels (1.6 Mpix)

Pfingstwiese Mine underground 2017

Pfingstwiese Mine, Bad Ems, Bad Ems District, Lahn valley, Rhineland-Palatinate, Germany

Copyright: © Roger Lang      Photo ID: 834510     Uploaded by: Roger Lang   View Count: 80   Approval status: Public galleries    Type: Photo - 1500 x 1000 pixels (1.5 Mpix)

Entrance of Northern Main Ramp

Tsumeb West Mine, Tsumeb, Oshikoto Region, Namibia

Copyright: © Roger Lang 2017      Photo ID: 822661     Uploaded by: Roger Lang   View Count: 66   Approval status: Public galleries    Type: Photo - 1500 x 1000 pixels (1.5 Mpix)

EY6-KYKGoethite : α-Fe3+O(OH)

Shwe-pyi-aye, Mogok Valley, Mogok Township, Pyin-Oo-Lwin District, Mandalay Region, Myanmar

Dimensions: 16 mm x 15 mm x 16 mm

Biggest xl 1.6 x 1.5 x 1.6 cm, own find, 4th mindat conference.
Found during the 2016 Mindat conference: pyrite crystals pseudomorphed or covered by goethite (I did not break any of my finds open to see if there is pyrite left). Forms are mostly cubes but also modified by the pentagondodecahedron (pyritohedron). Sometimes clusters. These are three examples which were typical for the finds that could be made in Nov. 2016.
Copyright: © Roger Lang      Photo ID: 797024     Uploaded by: Roger Lang   View Count: 59   Approval status: Public galleries    Type: Photo - 1600 x 987 pixels (1.6 Mpix)
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