Properties of Gritstone lan Anthracite
ukuran gandum
coarse grained
medium kanggo nggoleki coarse grained
rengat
conchoidal
conchoidal
porosity
Highly keropos
kurang keropos
kekuatan compressive
ora Sumadhiya
cleavage
sampurna
non-ana
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.250
1.1-1.4
Kapadhetan
2.2 g / cm 3
1.25-2.5 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan
tahan panas, banyu tahan