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Synonyms: Policrom, Policrome, Polichrome, Polycrome
Location: Polychrome granite is quarried near Bagotville, Quebec, Canada.
Description: Polychrome granite is a coarse-grained, brown-grey granite of the Precambrian period. This stone internationally may be nominated as a granite and in the area of application of the European Standard this stone must be nominated as a granite.
A small sample of Polychrome 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, Polychrome granite is frost free and polish constant.
Technical and Physical Characteristics:
Compression tensile strength: 2387 kg/cm2
Tensile strength after freeze-thaw cycles: 2196 kg/cm2
Unitary modulus of bending tensile strength: 145 kg/cm2
Heat expansion coefficient: 0.0051 mm/m°C
Water imbibition coefficient: 0.001200
Impact strength: 80 cm
Frictional wear: 0.75 mm
Mass by unit of volume: 2575 kg/m3
Granite: Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granites are usually medium to coarse grained, occasionally with some individual crystals larger than the groundmass forming a rock known as porphyry. Granites can be pink to dark grey or even black, depending on their chemistry and mineralogy.