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Amesite : Mg2Al[(OH)4|AlSiO5] | |
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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. ... Mindat.org Photo of the Day - 1st Feb 2006 |
| © Saul Krotki 2004 | Photo ID: 15289 View Count: 2472 |
Amesite : Mg2Al[(OH)4|AlSiO5] | |
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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. ... |
| © Saul Krotki 2004 | Photo ID: 15288 View Count: 917 |
Amesite : Mg2Al[(OH)4|AlSiO5] | |
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Cerro Sapo, Ayopaya Province, Cochabamba Department, Bolivia Amesite crystal terminations, 200 microns in diameter, exhibiting six-fold sector twinning. The crystal lengths are 500 microns. 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. ... |
| © Saul Krotki 2004 | Photo ID: 15294 View Count: 781 |
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Cerro Sapo, Ayopaya Province, Cochabamba Department, Bolivia A magnified image of stellate twinned crystals of Amesite on a specimen offered by Alfredo Petrov at the Seattle Mineral Market. The field of view is 1.3 mm. Robert Meyer specimen and photograph Mindat.org Photo of the Day - 21st Aug 2009 |
| © 2009 ROM | Photo ID: 233662 View Count: 651 |
Ankerite : Ca(Fe2+ ,Mg,Mn2+)(CO3)2, Sodalite : Na8[Cl2|Al6Si6O24] | |
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Cerro Sapo, Ayopaya Province, Cochabamba Department, Bolivia 6.5cm ankerite-carbonatite rock. Collected by Alfredo Petrov. |
| © Alfredo Petrov | Photo ID: 167189 View Count: 173 |
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Cerro Grande Mine, Cerro Grande District, Arque Province, Cochabamba Department, Bolivia Exquisite group of Apatite-(CaF) crystals 10.5cm across with minor siderite. photographed by, and in the collection of, Karl Volkman. Thanks to Alfredo Petrov for correcting the identification of this specimen. |
| © Karl Volkman 10/07 | Photo ID: 130886 View Count: 102 |
Arsenopyrite : FeAsS - (Fe0.90Co0.10)AsS, Quartz : SiO2 | |
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Kami Mine, Ayopaya Province, Cochabamba Department, Bolivia 2cm field of view. Arsenopyrite ribbons included inside a quartz crystal from the Kami Mine. Limited find, found by Alfredo Petrov just before the 2006 Tucson show. |
| © The-Vug.com | Photo ID: 50772 View Count: 432 |
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Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia 5.6 x 3.1 x 1.8 cm. Here we have a good representative Boracite specimen from a new find a few months ago in Bolivia. While these specimens are not a new find per se, they are new specimens from a well known locality. Most people are familiar with the Danburites from this locality, but the other staple species found here is Boracite. This piece ... |
| © Rob Lavinsky | Photo ID: 172104 View Count: 136 |
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Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia 5.3 x 3.7 x 3.5 cm. Here is a fine specimen Boracite specimen from a find a few months ago in Bolivia. This piece features a well formed, sharp, green-blue color cube of this hard to find species on matrix. The cube measures 10 mm on edge. |
| © Rob Lavinsky | Photo ID: 185379 View Count: 83 |
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Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia 6.8 x 6.0 x 3.0 cm. Here is a good representative Boracite specimen from a new find a few months ago in Bolivia. While these specimens are not a new find per se, they are new specimens from a well known locality. Most people are familiar with the grey Danburites from this locality, but the other staple species found here is Boracite. This piece ... |
| © Rob Lavinsky | Photo ID: 233500 View Count: 71 |
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