Properties of Slate lan Lignite
ukuran gandum
banget nggoleki-grained
medium kanggo nggoleki coarse grained
rengat
splintery
conchoidal
tilas
cahya kanggo coklat peteng
ireng
porosity
kurang keropos
Highly keropos
luster
kurang
kurang kanggo vitreous kanggo submetallic
kekuatan compressive
ora Sumadhiya
kateguhan
1.2
ora kasedhiya
tartamtu gravitasi
2.65-2.8
1.1-1.4
Kapadhetan
2.6-2.8 g / cm 3
800-801 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan, nyandhang tahan
tahan panas