Coal is excavated at the Jim Bridger Mine, owned by energy firm PacifiCorp and the Idaho Power Company, outside Point of the Rocks, Wyoming March 14, 2014. West Virginia mined 120 million tons (109 metric tons) of coal in 2012, second to Wyoming, or about 12 percent of total U.S. production. Kentucky was third with about 9 percent of output, according to the National Mining Association. REUTERS/Jim Urquhart (UNITED STATES – Tags: ENERGY BUSINESS) – RTR3H5NY


Coal is a natural dark brown-to-black solid used as a fuel formed from fossilized plants. Coal can be ignited and burned to produce energy in the form of heat. It consists of various organic and inorganic compounds.

What are the types of coal?

The four major ranks are

Anthracite The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter.
Bituminous Bituminous coal is a middle rank coal between subbituminous and anthracite. Bituminous usually has a high heating (Btu) value and is the most common type of coal used in electricity generation in the United States. Bituminous coal appears shiny and smooth when you first see it, but look closer and you may see it has layers.
Subbituminous Subbituminous coal is black in color and dull (not shiny), and has a higher heating value than lignite.
Lignite Lignite coal, aka brown coal, is the lowest grade coal with the least concentration of carbon.
Also, there is peat. Peat is not actually coal, but rather the precursor to coal. Peat is a soft organic material consisting of partly decayed plant and, in some cases, deposited mineral matter. When peat is placed under high pressure and heat, it becomes coal.


Petroleum Coke, also known as Pet Coke, is an industrial solid fuel derived from the distillation of crude petroleum during the refining process. It is used by cement plants to generate thermal energy and produce clinker in their rotary kilns. It is appreciated for its high calorific value.

Our Supply

DOLOMITA has strategic relationships with suppliers around the world to supply Coal and Petcoke of various Origins, Calorific values, Moistures and Ash content .