Properties of Scoria lan Porphyry
ukuran gandum
grained nggoleki
grained nggoleki
rengat
conchoidal
ora duwe aturan baku
porosity
Highly keropos
kurang keropos
luster
subvitreous kanggo kurang
kurang
tartamtu gravitasi
ora Sumadhiya
2.5-4
transparan
opaque
tembus kanggo opaque
Kapadhetan
ora Sumadhiya
2.5-2.52 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan, nyandhang tahan
tahan panas, impact tahan