Properties of Hornfels lan Nephelinite
ukuran gandum
grained nggoleki
grained nggoleki
porosity
Highly keropos
kurang keropos
luster
mengilap
vitreous kanggo metallic
kateguhan
durung ketemu
2.7
tartamtu gravitasi
3.4-3.9
2.4-2.9
Kapadhetan
0.25-0.30 g / cm 3
2.5-3 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan
tahan panas