Tarn Grey Granite
Return to granite samples page.
Synonyms: Tarn-Granit, Tarn Granit, Tarngranit
Location: Tarn Grey granite is quarried near Sidobre, Castres, Dept. Tarn, Midi-Pyrenees, Massif Central, France.
Description: Tarn Grey granite is a Commercial name for a medium to coarse-grained, grey to nearly white granite of the Carboniferous 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 Tarn Grey 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, Tarn Grey granite is frost free and polish constant.
Technical and Physical Characteristics:
Compression tensile strength: 1533 kg/cm2
Tensile strength after freeze-thaw cycles: 1556 kg/cm2
Unitary modulus of bending tensile strength: 150 kg/cm2
Heat expansion coefficient: 0.0080 mm/m°C
Water imbibition coefficient: 0.004700
Impact strength: 69 cm
Mass by unit of volume: 2623 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.