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Georg Graf's Photo Gallery

Industrial safety at the Rammelsberg Mine

The picture shows working safety at the Rammelsberg Mine in the 16th century. The worker is using gloves at his hands and bark at his lower leg for protection. From Georgius Agricola, XII Books of Mining and Metallurgy.
Copyright: © GG      Photo ID: 266632     Uploaded by: Georg Graf   View Count: 89   Approval status: Public galleries    Type: Photo - 449 x 467 pixels (0.2 Mpix)

Pingen at the Rammelsberg

Rammelsberg, Goslar, Harz, Lower Saxony, Germany

A row of day falls at the north side of the Rammelsberg Mountain. Age unknown. Photo was taken in autumn 2008.
Copyright: © GG      Photo ID: 191224     Uploaded by: Georg Graf   View Count: 679   Approval status: Public galleries    Type: Photo - 972 x 648 pixels (0.6 Mpix)

Upper Flambacher Watercourse, image 2

Clausthal-Zellerfeld, Harz, Lower Saxony, Germany

For winning water to operate mining machines, in the last centuries in the Harz mining area over 100 kilometers of water courses were constructed, of which the Upper Flambacher Watercourse is one. Having crossed a small valley, the water disappears in a tunnel. Autumn 2008.
Copyright: © GG      Photo ID: 191015     Uploaded by: Georg Graf   View Count: 268   Approval status: Public galleries    Type: Photo - 648 x 972 pixels (0.6 Mpix)

Upper Flambacher Watercourse

Clausthal-Zellerfeld, Harz, Lower Saxony, Germany

For collecting water to work mining machines, in the last centuries over hundred kilometers of water courses were constructed in the Harz mining area. Here we see a tunnel in the Upper Flambacher Watercourse. The water is leaving this tunnel, crosses a small valley, and disappears in an other tunnel. Autumn 2008.
Copyright: © GG      Photo ID: 191012     Uploaded by: Georg Graf   View Count: 281   Approval status: Public galleries    Type: Photo - 972 x 648 pixels (0.6 Mpix)

Upper Flambacher Pond

Clausthal-Zellerfeld, Harz, Lower Saxony, Germany

Since the Middle Ages water was used in the Harz mining area to operate machines. For that reason some hundred artificial ponds and lakes were constructed, of which the Upper Flambacher Pond is one. Autumn 2008. - Today the lakes are used for water sports; some for collecting drinking water.
Copyright: © GG      Photo ID: 191007     Uploaded by: Georg Graf   View Count: 247   Approval status: Public galleries    Type: Photo - 972 x 648 pixels (0.6 Mpix)

Shaft "Johannes Anweisung"

Clausthal-Zellerfeld, Harz, Lower Saxony, Germany

Former shaft "Johannes Anweisung", near Clausthal-Zellerfeld, very near to the pithead building "Untere Innerste". Diameter ca. 3 m. An old trial. Foto was taken in may 2013.
Copyright: © GG      Photo ID: 190998     Uploaded by: Georg Graf   View Count: 381   Approval status: Public galleries    Type: Photo - 972 x 648 pixels (0.6 Mpix)

Y9D-YJ4Quartz (Var: Rose Quartz) : SiO2, Molybdenite : MoS2

Multiple photos available
Ankele Dolomite Quarry, Pieksämäki, Eastern Finland Region, Finland

Field of View: 15 cm

Spezimen 10 cm wide. Found in Summer 1994.
Copyright: © GG      Photo ID: 190450     Uploaded by: Georg Graf   View Count: 578   Approval status: Public galleries    Type: Photo - 913 x 648 pixels (0.6 Mpix)

RYN-LD8Uraninite : UO2, Hematite : Fe2O3

Multiple photos available
Müllenbach U deposit, Baden-Baden, Black Forest, Baden-Württemberg, Germany

Field of View: 8 cm

Impregnation of Uraninite (black) surrounded by Hematite (red) in Arkose Sandstone, containing Sericite by K-metasomatosis. Typical for the Müllenbach deposit. Spezimen ca. 4 cm wide. Found in Summer 2008 in the forest near Müllenbach.
Copyright: © GG      Photo ID: 189453     Uploaded by: Georg Graf   View Count: 1575   Approval status: Public galleries    Type: Photo - 972 x 648 pixels (0.6 Mpix)

LP3-C9XLimonite : FeO(OH)·nH2O, Calcite : CaCO3

Salzgitter, Lower Saxony, Germany

Field of View: 20 cm

Spezimen 14 cm wide, 8 cm high. - Typical Salzgitter "Trümmererz" = residual ore, consisting of Limonite, Quartz grains, clay minerals and others. Iron content in this kind of ore ca. 25 - 48 %. - On the top side a thin crust of Calcite crystals, fluorescent and phosphorescent. - Found in November 2007 at the former open pit at the Glockenberg, near the village of Dörnten, some kilometers south of Salzgitter. - Photo taken by a Canon EOS400D, program "close-up"; lighting with the lamp of a slide projector.
Copyright: © GG      Photo ID: 133099     Uploaded by: Georg Graf   View Count: 2000   Approval status: Public galleries    Type: Photo - 1024 x 668 pixels (0.7 Mpix)

G8U-QPDIlmenite : Fe2+TiO3, Titanite : CaTi(SiO4)O

Otanmäki Mine, Otanmäki, Kajaani, Northern Finland Region, Finland

Field of View: 60 mm

Dark grey Ilmenite, surrounded by a light red corona of Titanite; embedded in Plagioklase and an Amphibol Group mineral. Typical for the Otanmäki deposit. Found in 1981 on the dump of the Vuorokas mine, some kilometers east of Otanmäki. Spezimen 4 cm wide.
Copyright: © GG      Photo ID: 51664     Uploaded by: Georg Graf   View Count: 910   Approval status: Public galleries    Type: Photo - 500 x 369 pixels (0.2 Mpix)
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