Properties of Picrite lan Lignite
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
ora rata
conchoidal
tilas
putih, greenish putih utawa abu-abu
ireng
porosity
kurang keropos
Highly keropos
luster
subvitreous kanggo kurang
kurang kanggo vitreous kanggo submetallic
kekuatan compressive
ora Sumadhiya
kateguhan
2.1
ora kasedhiya
tartamtu gravitasi
2.75-2.92
1.1-1.4
Kapadhetan
1.5-2.5 g / cm 3
800-801 g / cm 3
resistance
tahan panas
tahan panas