The state that produces the most anthracite coal is Pennsylvania. Pennsylvania produces nearly 1.8 million tons of the almost 5 million tons produced in the United States every year.
Anthracite is a hard coal, and it is the oldest type of coal because it took nature the longest to form. It is also called black diamonds because it is the shiniest type of coal. Anthracite coal has the highest carbon content, highest calorific content and the least impurities.
In 1790, Necho Allen discovered anthracite coal in Pottsville, Pennsylvania. On Feb. 11, 1808, Judge Jesse Fell used it experimentally as residential heating fuel in Wilkes-Barre, Pennsylvania.