Dust-free sand, also known as washed sand, is a nonmetallic mineral, a hard, wear-resistant silicate mineral with stable chemical properties, and its main mineral component is SiO2. Its color is grayish white and grayish yellow, and it consists of medium fine sand, medium coarse sand, coarse sand, gravel layer and gravel layer. Need more building materials to leave a message for customer service. This is a customizable product. Please contact customer service if you have any demand for specific quotation, materials, size, etc.