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