Properties of Batubara lan Pegmatite
ukuran gandum
medium kanggo nggoleki coarse grained
medium kanggo coarse grained
rengat
conchoidal
conchoidal
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
grainy, mutiyara lan vitreous
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
sampurna
kateguhan
ora kasedhiya
2.1
tartamtu gravitasi
1.1-1.4
2.6-2.63
transparan
opaque
tembus kanggo opaque
Kapadhetan
1100-1400 g / cm 3
2.6-2.65 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas
tahan panas, impact tahan, meksa tahan