Properties of Batubara lan Tephrite
ukuran gandum
medium kanggo nggoleki coarse grained
medium kanggo nggoleki coarse grained
rengat
conchoidal
ora rata
porosity
kurang keropos
banget kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
subvitreous kanggo kurang
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
crenulation lan mrembet
kateguhan
ora kasedhiya
2.4
tartamtu gravitasi
1.1-1.4
2.86
Kapadhetan
1100-1400 g / cm 3
2.8-2.9 g / cm 3
resistance
tahan panas
tahan panas, impact tahan