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Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Bahia, Northeast Region, Brazil Twinned greenisk-black chrysoberyl var. 'alexandrite' which measures 10 x 7 mm on a schist matrix. Photo and collection Antonio Borrelli. |
| © Antonio Borrelli | Photo ID: 36615 View Count: 581 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Bahia, Northeast Region, Brazil An EXCELLENT, sharp and lustrous sixling chrysoberyl variety alexandrite from Bahia, Brazil. This fine specimen shows the red to green pleochrosim characteristic of alexandrite. Ex Sam Nasser Collection. it IS purple when baclit strongly with halogen and it is green in sunlight, quite clearly, in person. 2.4 x 2.3 x 1.1 cm |
| © Rob Lavinsky | Photo ID: 54892 View Count: 517 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Bahia, Northeast Region, Brazil Floater crystal of 'alexandrite' partially encrusted with biotite, showing cyclical twinning. Size: 24 x 25 x 4 mm - Photo and collection Antonio Borrelli. |
| © Antonio Borrelli | Photo ID: 44915 View Count: 448 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Bahia, Northeast Region, Brazil Picture width ~ 35 mm. Rui Nunes specimen and photo. December 2007. |
| © Rui Nunes 2008 | Photo ID: 168925 View Count: 202 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Carnaiba Mine, Pindobaçu, Campo Formoso District, Bahia, Northeast Region, Brazil Twinned crystals of chrysoberyl variety alexandrite in schist-like matrix. The specimen has noticeable green to purple color change and the twinned crystals are distinctly visible. Overall size of mineral specimen: 4x2.5x1.4\5 cm. Size of individual crystals: 1 cm. |
| © 2002 John H. Betts | Photo ID: 4076 View Count: 799 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Carnaiba Mine, Pindobaçu, Campo Formoso District, Bahia, Northeast Region, Brazil Two interconnected sixling twins of chrysoberyl variety alexandrite. There are many faces, some with schist-like matrix coating, making this specimen difficult to photograph - must be seen in person to be appreciated. Overall size of mineral specimen: 22x18x12 mm. Size of individual crystals: 5-10 mm. |
| © 2002 John H. Betts | Photo ID: 4367 View Count: 741 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Carnaiba Mine, Pindobaçu, Campo Formoso District, Bahia, Northeast Region, Brazil size:5x8cm. Paul Bongaerts specimen and photograph |
| © Paul Bongaerts | Photo ID: 27377 View Count: 673 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Carnaiba Mine, Pindobaçu, Campo Formoso District, Bahia, Northeast Region, Brazil Twinned 'alexandrite' crystal measuring 23 x 20 x 4 mm on schist matrix. Photo and collection Antonio Borrelli. |
| © Antonio Borrelli | Photo ID: 38856 View Count: 567 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Carnaiba Mine, Pindobaçu, Campo Formoso District, Bahia, Northeast Region, Brazil Sixling twin of chrysoberyl variety alexandrite in hexagonal shape with faces covered with schist-like matrix coating. Fully crystallized front and back with no apparent point of attachment - a floater. Overall size of mineral specimen: 20x20x15 mm. Size of individual crystals: 10 mm. |
| © 2002 John H. Betts | Photo ID: 4368 View Count: 555 |
Chrysoberyl (Var: Alexandrite) : BeAl2O4 | |
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Carnaiba Mine, Pindobaçu, Campo Formoso District, Bahia, Northeast Region, Brazil Macle with 2x1cm in matrix with 3,5x3,5x1cm - December of 2003 |
| © Martins da Pedra | Photo ID: 42799 View Count: 439 |
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