Official State Mineral of Kentucky
Coal was designated the official "state mineral" of Kentucky in 1998. Coal is an organic sedimentary rock used as fuel. All State Rocks & Minerals
Coal is a fossil fuel, composed largely of carbon, formed from the remains of plants that lived approximately 100 to 400 million years ago. The first known use of coal in what was to become Kentucky was in 1750, by a Dr. Thomas Walker.