Properties of Greywacke lan Porphyry
ukuran gandum
sudut lan nggoleki
grained nggoleki
rengat
conchoidal
ora duwe aturan baku
porosity
Highly keropos
kurang keropos
tartamtu gravitasi
2.2-2.8
2.5-4
transparan
opaque
tembus kanggo opaque
Kapadhetan
2.6-2.61 g / cm 3
2.5-2.52 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan
tahan panas, impact tahan