Properties of Batubara lan Basalt
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
rengat
conchoidal
conchoidal
tilas
ireng
putih kanggo werna abu-abu
porosity
kurang keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
ora kasedhiya
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
2.3
tartamtu gravitasi
1.1-1.4
2.8-3
Kapadhetan
1100-1400 g / cm 3
2.9-3.1 g / cm 3
resistance
tahan panas
tahan panas, meksa tahan, nyandhang tahan