Properties of Batubara lan Argillite
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
rengat
conchoidal
conchoidal kanggo ora rata
tilas
ireng
putih kanggo werna abu-abu
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
waxy lan kurang
kateguhan
ora kasedhiya
2.6
tartamtu gravitasi
1.1-1.4
2.56-2.68
Kapadhetan
1100-1400 g / cm 3
2.54-2.66 g / cm 3
resistance
tahan panas
tahan panas, impact tahan