Properties of Batubara lan Icelandite
ukuran gandum
medium kanggo nggoleki coarse grained
banget nggoleki-grained
rengat
conchoidal
ora rata
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
vitreous
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
1.1
tartamtu gravitasi
1.1-1.4
2.5-2.8
Kapadhetan
1100-1400 g / cm 3
2.11-2.36 g / cm 3
resistance
tahan panas
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan