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
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%
