Properties of Porphyry lan Schist
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
ora duwe aturan baku
conchoidal
porosity
kurang keropos
Highly keropos
tartamtu gravitasi
2.5-4
2.5-2.9
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.5-2.52 g / cm 3
2.8-2.9 g / cm 3
resistance
tahan panas, impact tahan
impact tahan, meksa tahan, banyu tahan