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the polished degree : the higher the more smooth . the polished degree level depond on the material itself and the machine and polished way . the material is more harder . the degree is more higher .

for 1cm ,1.5cm ,always +-5mm (surface polished ) for 2cm, 3cm always +-1mm (surface polished for 5, or more thickness always 1.5cm (surface polished for flamed . always +-1mm or +-1.5mm

For 20 feet container . it can be load up to 27 Tons . always the granite per cube meter weight 2.7 Tons so per container can load up to 10cube . for 1cm it can be load up to 950----970 sqm for 1.5cm is about 650 sqm for 2cm is 480-500sqm for 3cm is 310-330sqm for 4cm is 240-250sqm for 5cm is 190-200sqm for 6cm is 165-170sqm for 7cm is 140-145sqm for 8cm is 120-125sqm for 10cm is about 100sqm

always it is 2.7tons/cubic . for granite . for for the black colour such as shangXi Black it is up to 3.1Tons /cubic . G684 is 2.9Tons/Cubic the harder the heavy