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