Size:
A) 305 x 305mm or 12 x 12"
B) 600 x 600mm or 24 x 24"
C) Half slab or slabs
D) Thickness: 10mm (3/8"), 12mm (1/2"), and 20mm (3/4")
E) Cut-to-size or as per customer requirement.
Finish: polished, flamed, honed, bush hammered, sand-blasted etc
Packing: tiles by carton then to wooden crate, cut to size by crate, slabs by wooden bundle
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Physically, commercial granites are hard, compact rocks with fine to coarse grains of metamorphic or igneous origin.
Hardness: 6 to 7 on moh's scale
Density: 2.6 to 2.8 kg/cm3
Compressive strength: 140 to 210 n/mm2
Modulus of rupture: 15 to 25 n/mm2
Water absorption: 0.1-0.6%
Average wear: less then 1%
Porosity: quite low
Weather impact: resistant
Chemically, they are igneous/metamorphic rocks composed of quartz, feldspar & ferromagnesian minerals like kriolite, chlorite, garnet, etc. A typical granite will have following chemical composition:
Silica (sio2): 70-75%
Al2o3: 10-15%
Cao+mgo: less then 0.5%
Feo + fe2o3: 2-4%
Alkalies: 4-6%
Tio2: less then 0.5%
Loss on ignition (loi): less then 0.5%
