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lack coal, hard coal, stone coal, blind coal, Kilkenny coal, crow coal, craw coal, black diamondMetamorphic rock
Anthracite coalComposition
Carbon, 9298%Anthracite, often referred to ashard coal, is a hard, compact variety ofcoalthat has asubmetallic luster. It has the highestcarboncontent, the fewest impurities, and the highestenergy densityof all types of coal and is the highestrankingof coal.Anthracite is the mostmetamorphosedtype of coal (but still represents low-grade metamorphism), in which the carbon content is between 92% and 98%.The term is applied to those varieties of coal which do not give offtarryor otherhydrocarbonvapours when heated below their point ofignition.Anthracite ignites with difficulty and burns with a short, blue, and smokeless flame.Anthracite is categorized into standard grade, which is used mainly in power generation, and high grade (HG) and ultra high grade (UHG), the principal uses of which are in themetallurgysector. Anthracite accounts for about 1% of global coal reserves, and is mined in only a few countries around the world.