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Orthoclase, Quartz (Var: Smoky Quartz)


Orthoclase : K[AlSi3O8], Quartz (Var: Smoky Quartz) : SiO2

Photo Copyright © Photo & Collection of Martins da Pedra  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Nossa Senhora da Esperança Quarry, Quintela de Azurara, Mangualde, Viseu District, Portugal
Crystals up to 4cm in field with 10x8cm - March of 2006

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