Sandstone Paragneiss, metamorphic rock, from Valle Germanasca (Piedmont, Italy), thin section, using crossed Nicols, x37x1,3.

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Keywords: calcite, cross, geology, germanasca, horizontal, italy, limestone, magnification, metamorphic, micrograph, paragneiss, part, people, piedmont, refraction, rock, sample, sandstone, science, scientific, section, valle