Lignite, Not Agglomerated (Excluding Jet)

Lignite — the lowest-rank solid coal, also called brown coal — is distinguished from jet (a gemstone-quality material) and classified here in its loose, non-agglomerated form under tariff line 2702100000. Its high moisture content and relatively low calorific value limit long-distance trade, making it primarily a domestic fuel in producing countries; US import volumes are correspondingly modest. Canada and China are the only notable suppliers to the US market under this heading. Accurate rank determination separating lignite from sub-bituminous coal is a recurring classification challenge, typically resolved by calorific value testing on a moist, ash-free basis.