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Serizzo Antigorio
Medium-grained granitic orthogneiss, dark-grey in colour due to abundant biotite mica (the darkest Serizzo variety). The stone presents homogeneous texture and well defined foliation. Mineralogical composition: quartz, K-feldspar (small porphyroclasts), plagioclase (An 25-30%), biotite, rare white mica and epidote (allanite). |