Properties of Batubara lan Websterite
ukuran gandum
medium kanggo nggoleki coarse grained
coarse grained
rengat
conchoidal
ora rata
tilas
ireng
putih, greenish putih utawa abu-abu
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
kurang kanggo vitreous kanggo submetallic
tartamtu gravitasi
1.1-1.4
3.2-3.5
Kapadhetan
1100-1400 g / cm 3
3.1-3.6 g / cm 3
resistance
tahan panas
impact tahan, meksa tahan, nyandhang tahan