Properties of Nephelinite lan Itacolumite
ukuran gandum
grained nggoleki
coarse utawa nggoleki
porosity
kurang keropos
Highly keropos
luster
vitreous kanggo metallic
kurang
tartamtu gravitasi
2.4-2.9
2.2-2.8
Kapadhetan
2.5-3 g / cm 3
2.2-2.8 g / cm 3
resistance
tahan panas
tahan panas, impact tahan, meksa tahan