1,used as countertop,paver,house decoration and so on 2,it is a kind of hard stone 3,different colors. We have ... : Above 85 degree. For black granite, above 90 degree.Tolerance of thickness: +/-2mm4.Quarry pictures,5,Packing: By strong wooden bundles ... , 7-9 bundles in 20' container Chinese Grey/black Quartzite with cheapest price and good quality