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