Properties of Gneiss lan Scoria
ukuran gandum
medium kanggo coarse grained
grained nggoleki
rengat
ora duwe aturan baku
conchoidal
porosity
banget kurang keropos
Highly keropos
luster
kurang
subvitreous kanggo kurang
kekuatan compressive
ora Sumadhiya
tartamtu gravitasi
2.5-2.7
ora Sumadhiya
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.6-2.9 g / cm 3
ora Sumadhiya
resistance
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan