... and penetration etc. Quartz Stone is widely used for kitchen countertops, quartz tiles,floor, wall, bathroom,quartz countertops,quartz surface, windows, ... sizeColor: more than 50 are availableCharacteristic of Quartz surface stone:1.Super hardness, resistant to ... no radiationThis is the quality standard of our quartz products: Specification ItemUnitStandard RequestActural measurementEdges and Corners ...