With natural granite and marble as raw material, the sand is natural, integral in shape, acid-, alkali- and saline-resistant, and highly ultraviolet radiation-resistant. The fastness sand is commonly used in construction material industries. Granularity varies from 10 to 20, 20 to 40,40 to 80, to 80 to 120, which can be tailored to your will. And you can also choose its color from a wide range of 50+ kinds.