Properties of Hornfels lan Gneiss
ukuran gandum
grained nggoleki
medium kanggo coarse grained
rengat
conchoidal
ora duwe aturan baku
porosity
Highly keropos
banget kurang keropos
kateguhan
durung ketemu
1.2
tartamtu gravitasi
3.4-3.9
2.5-2.7
transparan
opaque
tembus kanggo opaque
Kapadhetan
0.25-0.30 g / cm 3
2.6-2.9 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan, meksa tahan
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan