Properties of Batubara lan Flint
ukuran gandum
medium kanggo nggoleki coarse grained
banget nggoleki-grained
rengat
conchoidal
conchoidal
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
vitreous
tartamtu gravitasi
1.1-1.4
2.5-2.8
transparan
opaque
tembus kanggo opaque
Kapadhetan
1100-1400 g / cm 3
2.7-2.71 g / cm 3
resistance
tahan panas
tahan panas, impact tahan, meksa tahan, nyandhang tahan