Properties of Batubara lan Wackestone
ukuran gandum
medium kanggo nggoleki coarse grained
banget nggoleki-grained
rengat
conchoidal
conchoidal
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang
tartamtu gravitasi
1.1-1.4
2.2-2.8
Kapadhetan
1100-1400 g / cm 3
2.4-2.8 g / cm 3
resistance
tahan panas
tahan panas, impact tahan