Properties of Batubara lan Slate
ukuran gandum
medium kanggo nggoleki coarse grained
banget nggoleki-grained
rengat
conchoidal
splintery
tilas
ireng
cahya kanggo coklat peteng
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang
kekuatan compressive
ora Sumadhiya
kateguhan
ora kasedhiya
1.2
tartamtu gravitasi
1.1-1.4
2.65-2.8
Kapadhetan
1100-1400 g / cm 3
2.6-2.8 g / cm 3
resistance
tahan panas
tahan panas, impact tahan, meksa tahan, nyandhang tahan