jinis
Phyllite, Schist, lan Slate
peat, lignite, sub-bituminous batu bara, bituminous batu bara, Anthracite, grafit
fitur
gampang pecah dadi lancip piring, lumahan asring mengilap, rock grained banget nggoleki
mbantu ing produksi panas lan listrik, digunakake minangka bahan bakar fosil