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