This is anthracite coal, pea sort, from Pennsylvania. It is sold in one pound bags.
Anthracite coal, or hard coal, has the highest carbon content, the greatest hardness, and the fewest impurities.
This is "pea coal". Pea is a measurement of size, not content. The standard sizing of pea coal is 9/16 to 13/16 inches (14.31 to 20.62 millimeters). Some random pieces measured 0.5 to 2 inches.