Properties of Gneiss lan Rhyolite
ukuran gandum
medium kanggo coarse grained
gedhe lan coarse grained
rengat
ora duwe aturan baku
sub-conchoidal
porosity
banget kurang keropos
Highly keropos
cleavage
miskin
ora kasedhiya
tartamtu gravitasi
2.5-2.7
2.65-2.67
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.6-2.9 g / cm 3
2.4-2.6 g / cm 3
resistance
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan
tahan panas, nyandhang tahan