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Amesite
Amesite
:
Mg
2
Al[(OH)
4
|AlSiO
5
]
Photo Copyright © Saul Krotki 2004 - This image is copyrighted. Unauthorized reproduction prohibited.
Locality:
Cerro Sapo, Ayopaya Province, Cochabamba Department, Bolivia
Six-fold sector twinning is responsible for the creation of this distinctive field of stars made up of amesite crystal terminations.
The specimen was acquired in Bolivia by Alfredo Petrov from a 1,000 year old pre-Inca sodalite mine. These crystals occur in shallow vugs in a sodalite matrix from an ankerite-sodalite-barite carbonatite dike. Photomicrograph © Saul Krotki (.0523.2). The crystal terminations are 200 microns in diameter.
The crystal lengths are 500 microns. From a thumbnail specimen. Krotki Mineral Collection.
This Photo was Mindat.org Photo of the Day - 1st Feb 2006
This photo has been shown 1702 times
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The specimen was acquired in Bolivia by Alfredo Petrov from a 1,000 year old pre-Inca sodalite mine. These crystals occur in shallow vugs in a sodalite matrix from an ankerite-sodalite-barite carbonatite dike. Photomicrograph © Saul Krotki (.0523.2). The crystal terminations are 200 microns in diameter.
The crystal lengths are 500 microns. From a thumbnail specimen. Krotki Mineral Collection.
This Photo was Mindat.org Photo of the Day - 1st Feb 2006
This photo has been shown 1702 times