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Tarn Grey Granite From France WhatsApp Logo

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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. The veining and colour varies little and a small sample of Tarn Grey granite should be representative of the whole slab 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. During the polishing process a clear epoxy resin filler may be used to fill any micro fissures or tiny pitting however this does not affect the integrity of the stone, it merely provides an even smoother surface finish. Tarn Grey Granite is suitable for both interior and exterior use futhermore is frost resistant and with a constant polish.

Products: Suitable for construction projects both commercial and domestic, prefabricated countertops/worktops, vanities, tiles, backsplashes, paving, fireplaces and memorials.

Surface Finish: Tarn Grey Granite looks best with a gloss polished surface but is also available as honed, leather/satin, river-washed/antique, thermal/flamed, brushed and sandblast finish.

Sealing: Test with a small sample. It is possible that a sealant can be used on Tarn Grey granite however excessive attempts at sealing it could actually create a residue film build-up.

Block Sizes: This is a quarry yielding selectable, grades of granite with blocks suitable for gangsaw size down to economical tile-sized blocks. For commercial projects it is important to ensure that blocks are selected from the same quarry face.

Rough blocks are usually exported by Break Bulk however intermodal containerisation is available at extra cost. Finished products are packed into sea-worthy wooden crates and loaded into containers.

Quarry Location: Tarn Grey granite is quarried near Sidobre, Castres, Dept. Tarn, Midi-Pyrenees, Massif Central, France.

Synonyms: Tarn-Granit, Tarn Granit, Tarngranit

Granite: A coarse or medium-grained intrusive igneous rock that is rich in quartz and feldspar; it is the most common plutonic rock of the Earth's crust, forming by the cooling of magma (silicate melt) at depth. The principal constituent of granite is feldspar. Both plagioclase feldspar and alkali feldspar are usually abundant in it, and their relative abundance has provided the basis for granite classifications. In most granite, the ratio of the dominant to the subdominant feldspar is less than two. Rocks containing less than 20 percent quartz are almost never named granite, and rocks containing more than 20 percent (by volume) of dark, or ferromagnesian, minerals are also seldom called granite. The minor essential minerals of granite may include muscovite, biotite, amphibole, or pyroxene. Biotite may occur in granite of any type and is usually present, though sometimes in very small amounts.

Mineral Composition: Average by %

Technical Specifications

Compression Tensile Strength: 1533 kg/cm2

Tensile Strength After Freeze-Thaw Cycles: 1445 kg/cm2

Unitary Modulus Of Bending Tensile Strength: 150 kg/cm2

Heat Expansion Coefficient: 0.0080 mm/m°C

Water Imbibition Coefficient: 0.007400

Impact Strength: 69 cm

Frictional Wear: mm

Mass By Unit Of Volume: 2623 kg/m3

Hardness (Moh's Scale):

Note: These figures and details are given for guidance purposes only, no reliance should be taken as to their accuracy.


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