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Biotite | |
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Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola Crystal with 1x4,5x4,5cm - July of 1974 |
| © Martins da Pedra | Photo ID: 53326 View Count: 2143 |
Biotite | |
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Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola Crystal with 9x7,5x2,5cm - July of 1974 |
| © Martins da Pedra | Photo ID: 53270 View Count: 492 |
Biotite | |
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Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola Crystal with 11,5x5x2,5cm - July of 1974 |
| © Martins da Pedra | Photo ID: 53331 View Count: 301 |
Biotite | |
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Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola Crystal with 7x5x1,5cm - July of 1974 |
| © Martins da Pedra | Photo ID: 53329 View Count: 265 |
Biotite | |
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Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola Crystal with 8x4x1cm - July of 1974 |
| © Martins da Pedra | Photo ID: 53330 View Count: 261 |
Biotite | |
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Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola Crystal with 8x5x0,7cm - July of 1974 |
| © Martins da Pedra | Photo ID: 53328 View Count: 250 |
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Papachacra, Belen Department, Catamarca, Argentina 11 x 10 cm. |
| © Marcelo Olsina | Photo ID: 27100 View Count: 552 |
Biotite | |
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El Trapiche, Coronel Pringles Department, San Luis, Argentina Biotite on feldspar matriz. 7 x 7 aprox. |
| © Marcelo O. Olsina | Photo ID: 18964 View Count: 703 |
Biotite, Microcline : K[AlSi3O8] | |
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El Trapiche, Coronel Pringles Department, San Luis, Argentina 13 x 8 cm. |
| © Marcelo O Olsina | Photo ID: 15241 View Count: 572 |
Biotite | |
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El Trapiche, Coronel Pringles Department, San Luis, Argentina Black Biotite on Quartz. 7 x 5 cm. |
| © Marcelo O Olsina | Photo ID: 15194 View Count: 530 |
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