Properties of Porphyry lan Rhyolite
ukuran gandum
grained nggoleki
gedhe lan coarse grained
rengat
ora duwe aturan baku
sub-conchoidal
porosity
kurang keropos
Highly keropos
kekuatan compressive
ora Sumadhiya
cleavage
cacat
ora kasedhiya
tartamtu gravitasi
2.5-4
2.65-2.67
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.5-2.52 g / cm 3
2.4-2.6 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, nyandhang tahan