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