Properties of Gneiss lan Siltstone
ukuran gandum
medium kanggo coarse grained
grained nggoleki
rengat
ora duwe aturan baku
conchoidal
porosity
banget kurang keropos
Highly keropos
kekuatan compressive
ora Sumadhiya
cleavage
miskin
ora kasedhiya
tartamtu gravitasi
2.5-2.7
2.54-2.73
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.6-2.9 g / cm 3
2.6-2.7 g / cm 3
resistance
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan
tahan panas, impact tahan, meksa tahan, banyu tahan