Properties of Batubara lan Greywacke
ukuran gandum
medium kanggo nggoleki coarse grained
sudut lan nggoleki
rengat
conchoidal
conchoidal
porosity
kurang keropos
Highly keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang
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
2.6-2.61 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas
tahan panas, impact tahan, meksa tahan