Properties of Batubara lan Ganister
ukuran gandum
medium kanggo nggoleki coarse grained
coarse utawa nggoleki
rengat
conchoidal
splintery
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
sampurna
kateguhan
ora kasedhiya
2.6
tartamtu gravitasi
1.1-1.4
2.2-2.8
Kapadhetan
1100-1400 g / cm 3
2.2-2.8 g / cm 3
resistance
tahan panas
tahan panas, impact tahan, meksa tahan