natural and artifical colored sand in construction 1 technic:natural or ... :2000 3 color:fresh natural and artifical colored sand in construction1 feature:uniform partical size,fastness,acid- ... as the coating of the wall pave the road sand art7 market:Shijiazhuang Kedahua Imp & Exp Trade Co ... metalic mineral product ,such as vermiculite , perlite , colored sand and so on . It has its own factory namely ...