Coal is not a mineral because it is organic, and minerals are inorganic. Minerals have a repeating crystalline structure and a homogeneous chemical profile. Coal has neither. It forms over millions of years from the comp... More »

Coal is not considered a mineral because it does not have a solid, uniform crystal structure, meaning it doesn't fit the primary definition of a mineral. Coal is primarily made of carbon, but its properties can vary even... More »

www.reference.com Science Earth Science Geology

The coal formation process takes millions of years. The coal in use today started to form over 300 million years ago as living trees, ferns and other types of plant material. Coal is a nonrenewable resource because the t... More »

Carbon monoxide is a poisonous gas that is produced from the incomplete burning of fossil fuels, such as coal, oil, wood, charcoal, kerosene, propane and natural gas. It is also produced by products that use internal com... More »

www.reference.com Science Chemistry Organic Chemistry

Estimates of the amount of time that fossil fuels, oil, coal and gas, may last differs based upon estimates of remaining reserves and the predicted rate of usage. The estimates change over time as new reserves are discov... More »

Fossil fuels include oil, natural gas and coal. Coal is commonly extracted through deep mining, but surface mining is a less expensive alternative. Oil is reached through the drilling of nonporous rock barriers that trap... More »

www.reference.com Science Chemistry Organic Chemistry

Synthetic, or human-made dyes, were originally derived from coal tar. Synthetic dyes have a wider and brighter color range, longer color permanence, and are faster, easier and cheaper to produce than natural dyes. There ... More »