Properties of Pegmatite lan Batubara
ukuran gandum
medium kanggo coarse grained
medium kanggo nggoleki coarse grained
rengat
conchoidal
conchoidal
porosity
kurang keropos
kurang keropos
luster
grainy, mutiyara lan vitreous
kurang kanggo vitreous kanggo submetallic
tartamtu gravitasi
2.6-2.63
1.1-1.4
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.6-2.65 g / cm 3
1100-1400 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan
tahan panas