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