You searched for: “anthracite
1. Hard, lustrous coal containing a high percentage of fixed carbon and low percentage of volatile matter, generally formed by dynamic metamorphism but may it be produced by contact metamorphism induced by igneous intrusion.
2. A hard, dense, shiny variety of coal, containing over 90 percent carbon and a low percentage of ash and impurities, which causes it to burn without flame, smoke, or odor.

Because of its purity, anthracite gives off relatively little sulfur dioxide when burned.

This entry is located in the following unit: Geology or Related Geological Terms + (page 4)