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Uploaded on:
16/03/2009 07:00:00
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356.20 KB
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P number: P527609
Caption: A box of untreated foreign vermiculite, larger specimens, for A. G. McGregor of the Geological Survey of Great Britain.
Description: The image shows specimens of untreated vermiculite. Vermiculite is hydrated phlogopite mica,a member of the phyllosilicate group of minerals and closely resembles muscovite mica in appearance. British Geological Survey Petrology Collection sample number MC 7389. Vermiculite is usually mined in opencast pits by drilling and blasting. The flake-shaped particles of vermiculite are separated from the host rock by a process of crushing and air separation. To maintain consistent and reliable ore, vermiculites are often blended. The final concentrate is graded, ready for shipment. Vermiculite is found in various parts of the world. The major mines are located in South Africa, China, Brazil, Zimbabwe, and the United States.
Date taken: 25/06/1905
Photographer: Unknown
Copyright statement: Unknown
Orientation: Landscape
Size: 356.20 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Best of BGS Images/ Rocks and minerals  


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