Anthracite, feem ntau hu ua cov thee dawb lossis cov thee liab, yog cov thee metamorphosed ntau tshaj plaws. Nws yog ib qho nyuaj, ntom thiab nta ib qho xim hlau, nrog cov ntsiab lus carbon ntau dua 80% thiab cov ntsiab lus tsis hloov pauv tsawg dua 10%. Nws muaj ob peb impurities thiab tsis muaj kuab paug, thiab thaum kub hnyiab, nws tsim ib tug xiav nplaim uas yuav luag tsis muaj pa luam yeeb. Raws li lub ntuj huv lub zog qhov chaw, nws boasts cov tshuaj ruaj khov thiab tsis nquag spontaneous combustion. Nws tsis yog tsuas yog haum rau pej xeem kev siv xws li cua sov huv nyob rau sab qaum teb Tuam Tshoj thaum lub caij ntuj no thiab ua zaub mov, tab sis kuj ua lub luag haujlwm tseem ceeb hauv kev lag luam suav nrog kev tsim tshuaj lom neeg (rau kev tsim cov tshuaj ammonia thiab methanol), metallurgy (blast furnace txhaj) thiab tsim hluav taws xob. Tuam Tshoj yog tus tsim khoom loj thiab khaws cia ntawm anthracite, nrog rau nws cov nyiaj tso tawm tseem ceeb hauv Shanxi, Henan, Guizhou thiab lwm lub xeev.