Properties of Gneiss lan Nephelinite
ukuran gandum
medium kanggo coarse grained
grained nggoleki
rengat
ora duwe aturan baku
flat
porosity
banget kurang keropos
kurang keropos
luster
kurang
vitreous kanggo metallic
tartamtu gravitasi
2.5-2.7
2.4-2.9
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.6-2.9 g / cm 3
2.5-3 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, meksa tahan, ngeruk tahan, nyandhang tahan
tahan panas