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A Coal rock is a rock that contains coal. Players with a Mining level of 30 can mine coal rocks with a pickaxe, granting 50 Mining experience. Coal rocks can be found in numerous mines throughout RuneScape, most abundantly in the Mining Guild.
The three main ranks of coal are lignite, bituminous coal, and anthracite. Lignite is closely related to peat but has a lower moisture content. It has the lowest heating value of any of the ranks of coal. Bituminous coal is more dense than lignite and is black in color.