Properties of Batubara lan Marble
ukuran gandum
medium kanggo nggoleki coarse grained
grained medium
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang kanggo mutiyara kanggo subvitreous
tartamtu gravitasi
1.1-1.4
2.86-2.87
Kapadhetan
1100-1400 g / cm 3
2.4-2.7 g / cm 3
resistance
tahan panas
tahan panas