Properties of Batubara lan Tuff
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
rengat
conchoidal
ora rata
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
vitreous kanggo kurang
tartamtu gravitasi
1.1-1.4
2.73
Kapadhetan
1100-1400 g / cm 3
1-1.8 g / cm 3
resistance
tahan panas
tahan panas, impact tahan, meksa tahan, nyandhang tahan