Properties of Theralite lan Batubara
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
ora rata, splintery utawa conchoidal
conchoidal
porosity
Highly keropos
kurang keropos
luster
waxy lan kurang
kurang kanggo vitreous kanggo submetallic
kateguhan
1.5
ora kasedhiya
tartamtu gravitasi
2.5-2.8
1.1-1.4
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.7 g / cm 3
1100-1400 g / cm 3
resistance
impact tahan, meksa tahan, nyandhang tahan
tahan panas