Properties of Anthracite lan Nephelinite
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
porosity
kurang keropos
kurang keropos
luster
mengilap
vitreous kanggo metallic
kekuatan compressive
ora Sumadhiya
kateguhan
ora kasedhiya
2.7
tartamtu gravitasi
1.1-1.4
2.4-2.9
Kapadhetan
1.25-2.5 g / cm 3
2.5-3 g / cm 3
resistance
tahan panas, banyu tahan
tahan panas