Beola Bianca Granite
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Synonyms: Beola Bianco, Bianco Beola, Blanco Beola
Location: Beola Bianca granite is quarried near Beura, Domodossola, Trontano, Villadossola, Val d'Ossola, Provincia di Verbano-Cusio-Ossola, Piemonte, Italy.
Description: Beola Bianca granite is a Commercial name for a light grey gneiss (paragneiss) of Paleozoic age, with some single, little black tourmaline sheafs. 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 Beola Bianca granite is usually representative not 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, Beola Bianca granite is frost free and polish constant.
Mineral Composition: Quartz: 30%, Plagioclase: 15%, Orthoclase: 34%, Biotite: 5%, Muscovite: 14%, some Apatite, Tourmaline, Zircon
Compression tensile strength: 1345 kg/cm2
Tensile strength after freeze-thaw cycles: 1365 kg/cm2
Unitary modulus of bending tensile strength: 234 kg/cm2
Heat expansion coefficient: 0.0073 mm/m°C
Water imbibition coefficient: 0.002700
Impact strength: 59 cm
Frictional wear: 3.50 mm
Mass by unit of volume: 2740 kg/m3
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.