Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds
From the Old English term col, which has meant mineral of fossilized carbon since the 13th century
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Define Coal
Coal is one of the important type of rocks. If we have to define Coal in general, Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. Coal comes under Sedimentary Rocks. All Sedimentary Rocks have similar properties and formation process. Along with Coal Definition, know more about the History of Coal, Etymology of Coal in next sections.