Graphite is a form of coal, a native element mineral, a crystalline allotrope of carbon, and a semimetal. Under standard conditions, it is the most stable formation of carbon. Graphite is used as the standard state for explaining the heat of formation of carbon compounds in thermochemistry. Different types of graphite ores are crystalline graphite, amorphous graphite, lump graphite, pyrolytic graphite, and graphite fibers. Graphite is usually found in metamorphic rocks, during metamorphism, ... Read more