Properties of Hornfels lan Phonolite
ukuran gandum
grained nggoleki
grained nggoleki
rengat
conchoidal
conchoidal kanggo ora rata
porosity
Highly keropos
kurang keropos
luster
mengilap
greasy kanggo kurang
kateguhan
durung ketemu
ora kasedhiya
tartamtu gravitasi
3.4-3.9
2.6
transparan
opaque
tembus kanggo opaque
Kapadhetan
0.25-0.30 g / cm 3
2.6 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan, meksa tahan
tahan panas, impact tahan, nyandhang tahan