Properties of Obsidian lan Pegmatite
ukuran gandum
ora ditrapake
medium kanggo coarse grained
rengat
conchoidal
conchoidal
porosity
banget kurang keropos
kurang keropos
luster
vitreous
grainy, mutiyara lan vitreous
cleavage
non-ana
sampurna
kateguhan
ora kasedhiya
2.1
tartamtu gravitasi
2.6-2.7
2.6-2.63
transparan
tembus
tembus kanggo opaque
Kapadhetan
2.6 g / cm 3
2.6-2.65 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan