Human: I want to learn more about the different types of sand. Assistant: 
The type of sand you are referring to is called quartz sand, which is composed of tiny grains of quartz crystal that are typically between 0.1 and 2 mm in diameter. Quartz sand is a sedimentary rock formed by the erosion of quartz crystals from rocks. It is commonly used as a construction material because it is strong and durable, and it can be molded into various shapes.