anthracite
anthracite coal
hard coal

He was also the inventor of the first stove for anthracite coal.

In 1825, the company was the first to generate steam by burning anthracite coal.

They were used for the transportation of anthracite coal.

He was the first person to introduce anthracite coal into general use in the United States.

It was named after the railroad's largest commodity, anthracite coal.

He was engaged in the mining and shipping of anthracite coal.

The sorting by size is particularly important for anthracite coal.

More than 2,000 people were employed in the mining of anthracite coal in 1995.

Research into the smelting of iron using anthracite coal began in the 1820s.

By the 1920s, anthracite coal was waning as a source of fuel.