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English: Rhodizite, Tourmaline
Locality: Tetezantsio pegmatites (Antetezantsio), Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa Commune, Betafo District, Vakinankaratra Region, Antananarivo Province, Madagascar (Locality at mindat.org)
Size: 6.8 x 5.3 x 4.3 cm.
Rhodizite is one of the more impressive rare minerals that has been found in Madagascar. It has been found in only three localities outside Madagascar: Ural Mountains of Russia at Schaitansk, in England, and in Wisconsin. Before the discovery of Rhodizite in Madagascar, the largest known crystals were found in Russia and they only measured up to 1 cm. The other two localities produced very little Rhodizite, and the crystals were very small. Rhodizite is a rare gem mineral and is highly sought after by gem and mineral collectors alike. It forms a series with the newly approved species Londonite with Rhodizite being the potassium end member. This is a fine Rhodizite specimen featuring a very sharp, well formed, lustrous, gemmy, greenish yellow color crystal measuring 1.7 cm associated with pink and dark green bicolor Tourmaline on matrix. This material is Rhodizite, though unusually Rb-rich, and is not the same as Londonite, the relatively Cs-dominant analogue of Rhodizite named after Dr. David London. This specimen was exchanged from Madagascar specialist Dr. Federico Pezzotta. Ex. Brian Kosnar Collection.
Deutsch: Rhodizit, Turmalin
Fundort: Tetezantsio pegmatites (Antetezantsio), Tetezantsio-Andoabatokely Pegmatite Field, Gemeinde Andrembesoa, Distrikt Betafo, Region Vakinankaratra, Antananarivo , Madagaskar (Fundort bei mindat.org)
Größe: 6.8 x 5.3 x 4.3 cm.
Date before March 2010(2010-03)
Source http://www.mindat.org/photo-252688.html
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EXIF data:
File name rhodizite-tourmaline-252688.jpg
Size, Mbytes 0.19546484375
Mime type image/jpeg
Camera manufacturer NIKON
Camera model COOLPIX P90
Orientation of image 1
Image resolution in width direction 72
Image resolution in height direction 72
Unit of X and Y resolution 2
Exposure time 10/500 sec (0.02)
F number f / 8
Exposure program 1
ISO speed rating 64
Compressed bits per pixel 4
Exif version 0220
Lens focal length 10.3 mm
Date and time original image was generated 2009:09:13 23:29:04
Date and time image was made digital data 2009:09:13 23:29:04
Meaning of each component 
Exposure bias 0
Maximum lens aperture 3
Metering mode 5
User comments
Supported Flashpix version 0100
Color space information 1
Exif image width 472
Exif image length 432
Scene type 
Exposure mode 1
White balance 1
Digital zoom ratio 0
Focal length in 35 mm film 58 mm
Software used Adobe Photoshop 7.0

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