Properties of Batubara lan Gossan
ukuran gandum
medium kanggo nggoleki coarse grained
nggoleki grained medium
rengat
conchoidal
conchoidal
tilas
ireng
putih kanggo werna abu-abu
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
metallic
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
1.1-1.4
2.0
Kapadhetan
1100-1400 g / cm 3
ora Sumadhiya
resistance
tahan panas
tahan panas, impact tahan, meksa tahan