Properties of Batubara lan Kapur
ukuran gandum
medium kanggo nggoleki coarse grained
banget nggoleki-grained
rengat
conchoidal
ora kasedhiya
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang
kateguhan
ora kasedhiya
1
tartamtu gravitasi
1.1-1.4
2.3-2.4
Kapadhetan
1100-1400 g / cm 3
2.49-2.50 g / cm 3
resistance
tahan panas
tahan panas