Anthracite is a hard, compact variety of coal that has a lustre. It has the highest carbon content, is normally low in contaminants (the fewest impurities), and the highest calorific content of all types of coal (except for graphite).
Quality anthracite is categorised into grades, high grade (HG) and ultra-high grade (UHG) represent less than 5% of the overall anthracite market. Anthracite accounts for about 1% of global coal reserves, and is mined in only a few countries around the world. China accounts for the majority of global production; other producers are Russia, Ukraine, South Africa, Vietnam, the UK, Australia and the US.