Properties of Batubara lan Comendite
ukuran gandum
medium kanggo nggoleki coarse grained
grained medium
rengat
conchoidal
mrembet
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
2
tartamtu gravitasi
1.1-1.4
2.38
Kapadhetan
1100-1400 g / cm 3
ora Sumadhiya
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas
tahan panas, impact tahan