Properties of Batubara lan Picrite
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
rengat
conchoidal
ora rata
tilas
ireng
putih, greenish putih utawa abu-abu
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
subvitreous kanggo kurang
kekuatan compressive
ora Sumadhiya
kateguhan
ora kasedhiya
2.1
tartamtu gravitasi
1.1-1.4
2.75-2.92
Kapadhetan
1100-1400 g / cm 3
1.5-2.5 g / cm 3
resistance
tahan panas
tahan panas