Properties of Gneiss lan Teschenite
ukuran gandum
medium kanggo coarse grained
coarse grained
rengat
ora duwe aturan baku
conchoidal
porosity
banget kurang keropos
Highly keropos
luster
kurang
ora kasedhiya
cleavage
miskin
ora kasedhiya
tartamtu gravitasi
2.5-2.7
2.86-2.87
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.6-2.9 g / cm 3
2.7-3.3 g / cm 3
resistance
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan
impact tahan, meksa tahan, nyandhang tahan