Properties of Batubara lan Pantellerite
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
rengat
conchoidal
sub-conchoidal
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
earthy
cleavage
non-ana
conchoidal
kateguhan
ora kasedhiya
2
tartamtu gravitasi
1.1-1.4
ora Sumadhiya
transparan
opaque
tembus kanggo opaque
Kapadhetan
1100-1400 g / cm 3
ora Sumadhiya
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas
tahan panas