Serizzo Antigorio Granite
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Synonyms: Antigorio, Sarizzo, Serizzo Anitgorio, Serizzo Antegoria, Serizzo Antigorio, Serizzo Atigornio
Location: Serizzo Antigorio granite is quarried near Crodo, Val Antigorio, Provincia di Verbano-Cusio-Ossola, European Alps, Piemonte, Italy, near to the border of Switzerland. There are two types Serizzo Antigorio Chiaro (Light) and Serizzo Antigorio Scuro (Dark).
Description: Serizzo Antigorio granite is a coarse-grained, light to dark grey-black gneiss of the Carboniferous/Permian period. This stone internationally may be nominated as a granite but in the area of application of the European Standard this stone must be nominated as a gneiss.
A small sample of Serizzo Antigorio granite is not usually representative having a wide variation in colour and veining however swatch samples must be approved for large projects to ensure that the blocks are all extracted from the same quarry face for matching purposes. Ideal for both interior and exterior use, Sapphire Blue granite is frost free and polish constant.
Mineral Composition: Quartz: 30%, Plagioclase: 25%, Orthoclase: 26%, Biotite: 10%, Muscovite: 5%, Epidote: 3%; Apatite, Tourmaline, Zircon: 1%.
Gneiss: A common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. Gneissic rocks are usually medium to coarse-foliated and largely recrystallized but do not carry large quantities of micas, chlorite or other platy minerals. Gneisses that are metamorphosed igneous rocks or their equivalent are termed granite gneisses, diorite gneisses, etc.