Properties of Porphyry lan Dacite
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
ora duwe aturan baku
conchoidal
porosity
kurang keropos
kurang keropos
luster
kurang
subvitreous kanggo kurang
kateguhan
1.7
ora kasedhiya
tartamtu gravitasi
2.5-4
2.86-2.87
transparan
tembus kanggo opaque
tembus
Kapadhetan
2.5-2.52 g / cm 3
2.77-2.771 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan