Properties of Gneiss lan Ganister
ukuran gandum
medium kanggo coarse grained
coarse utawa nggoleki
rengat
ora duwe aturan baku
splintery
porosity
banget kurang keropos
Highly keropos
tartamtu gravitasi
2.5-2.7
2.2-2.8
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.6-2.9 g / cm 3
2.2-2.8 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan
tahan panas, impact tahan, meksa tahan