Properties of Batubara lan Granit
ukuran gandum
medium kanggo nggoleki coarse grained
gedhe lan coarse grained
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang kanggo grainy karo bagean kala-kala pearly lan vitreous
tartamtu gravitasi
1.1-1.4
2.6-2.7
Kapadhetan
1100-1400 g / cm 3
2.65-2.75 g / cm 3
resistance
tahan panas
tahan panas, nyandhang tahan