Properties of Batubara lan Novaculite
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
rengat
conchoidal
conchoidal
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
waxy lan kurang
kekuatan compressive
ora Sumadhiya
kateguhan
ora kasedhiya
1.5
tartamtu gravitasi
1.1-1.4
2.5-2.7
transparan
opaque
tembus kanggo opaque
Kapadhetan
1100-1400 g / cm 3
2.7 g / cm 3
resistance
tahan panas
tahan panas, impact tahan, meksa tahan, nyandhang tahan