Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

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: 81   Approval status: Public galleries    Type: Photo - 449 x 467 pixels (0.2 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: 243   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: 569   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: 1537   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: 1976   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

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: 886   Approval status: Public galleries    Type: Photo - 486 x 365 pixels (0.2 Mpix)

EHW-RD6Stilbite

Sandoy Island, Faroe Islands, Denmark

Found in August 1984 at Sandslid on Sandoy Island, when my father and I spent joyful holidays on the Faroe Islands. Spezimen 9 cm high.
Copyright: © GG      Photo ID: 50635     Uploaded by: Georg Graf   View Count: 468   Approval status: Public galleries    Type: Photo - 393 x 364 pixels (0.1 Mpix)

P5V-42YHeulandite, Celadonite : K(Mg,Fe2+)Fe3+(Si4O10)(OH)2

Streymoy Island, Faroe Islands, Denmark

Small crystals of Heulandite are covering druses in basalt. They are underlain by Celadonite, causing the green colour. Found in August 1984 south west of Thorshaven, when my father and I spent joyful holidays on the Faroe Islands. Spezimen 4 cm high.
Copyright: © GG      Photo ID: 50634     Uploaded by: Georg Graf   View Count: 524   Approval status: Public galleries    Type: Photo - 380 x 284 pixels (0.1 Mpix)

6RU-7VFGalena : PbS, Sphalerite : ZnS, Calcite : CaCO3

Hilfe Gottes Mine, Wiemannsbucht, Bad Grund, Harz, Lower Saxony, Germany

"Ringelerz" ("Cockade Ore"), consisting of Galena and Calcite, grown over an elongate piece of Sphalerite (with a little bit of Quartz). Spezimen 9x5 cm. Found in 1981 by my friend Michael.
Copyright: © GG      Photo ID: 50078     Uploaded by: Georg Graf   View Count: 1067   Approval status: Public galleries    Type: Photo - 648 x 486 pixels (0.3 Mpix)

5W1-J8YHydrozincite : Zn5(CO3)2(OH)6, Sphalerite : ZnS, Baryte : BaSO4

Rammelsberg Mine, Rammelsberg, Goslar, Harz, Lower Saxony, Germany

Found in 1984, "Neues Lager" (= "New Orebody") 11th level, 3rd sublevel, cross-cut 291E. "Band-Erz" ("banded ore"), consisting of light grey bands of ore with Sphalerite, Baryte and others; and dark grey bands of slate. The ore bands are partly covered by white Hydrozincite, generated by weathering. Spezimen 11 cm high.
Copyright: © GG      Photo ID: 49873     Uploaded by: Georg Graf   View Count: 718   Approval status: Public galleries    Type: Photo - 648 x 486 pixels (0.3 Mpix)
Page 1 of 3 (1 to 10 of 25 total)
1 2 3

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: May 25, 2015 16:46:30