coal, one of the most important primary fossil fuels, a solid carbon-rich material that is usually brown or black and most often occurs in stratified sedimentary deposits. We are Supplying Indonesia and Africa mined Coal . We can Supply Type 1 to Type 7 Gross Calorific Value ( 6,500 6,300 6,000 5,800 5,500 5,300 5100 and below)