Anthracite is a type of coal known for its high carbon content and low impurities. It is the hardest and most energy-dense form of coal, making it an efficient fuel source. Anthracite burns cleanly and produces a high heat output, which is why it is often used for heating homes and in industrial processes. This coal is typically found in regions with significant geological activity, such as the Appalachian Mountains in the United States. Due to its properties, anthracite is also used in water filtration systems and as a carbon source in various industrial applications.