Granite from Portugal
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Also known asAzul De Alpalhão, Cinzento De Alpalhão, Granite A.p. Spi, Mfi, Spi Socles.
Macroscopic descriptionFine grained and dominantly biotitic granite, with homogeneous greyish colour.
Petrographic descriptionRock with granular hypidiomorphic texture, showing slight alteration of the kaolinitic, sericitic and chloritic types.
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