... ,1), Light in weight, high in hardness;2), Natural stone,non-polluting, non-radioactive;3), Acid resistance, Corrosion resistance ... :Widely used in architecture(construction), landscape, textile and other industries.1), Architecture(construction): High in hardness,light in weight, ... ,clothes etc.4), Used for hollow brick blocks, grinding stone feet, light aggregate etc.Color: Red,Brown,Black and ...