- Anthracite: This is the highest-quality coal, with a high carbon content and low moisture content. It is hard and dense, and burns with a clean, blue flame.
- Bituminous coal: This is the most common type of coal, and it has a medium carbon content and moisture content. It is softer and less dense than anthracite, and burns with a yellow or orange flame.
- Sub-bituminous coal: This type of coal has a lower carbon content and higher moisture content than bituminous coal. It is soft and crumbly, and burns with a smoky flame.
- Lignite: This is the lowest-quality coal, with a high moisture content and low carbon content. It is soft and brown, and burns with a smoky flame.
- Peat: This is a type of coal that is formed from the decomposition of plant matter in wetlands. It is soft and spongy, and has a high moisture content.
- Cannel coal: This is a type of coal that is rich in volatile matter and has a low ash content. It burns with a bright flame, and is often used for making candles and lamp oil.
- Coke: This is a type of coal that has been heated in the absence of air, which drives off the volatile matter and leaves behind a hard, porous material. Coke is used as a fuel in blast furnaces and other industrial applications.
